Case Information
*2 Before P ROST , Chief Judge, L OURIE and T ARANTO , Circuit
Judges.
T ARANTO Circuit Judge.
IPR Licensing, Inc. (IPRL) owns U.S. Patent No. 8,380,244, which describes and claims “dual mode” com- munications devices that can use cellular networks as well as Wi-Fi networks. After IPRL sued ZTE Corp. and ZTE (USA) Inc. (jointly, ZTE) and Nokia Corp. for in- fringement in separate actions in the District of Dela- ware, ZTE filed a petition for inter partes review of claims 1–8, 14–16, 19–29, 36–38, and 41–44 of the patent under 35 U.S.C. §§ 311–312. The Patent Trial and Appeal Board instituted a reviеw of all of the challenged claims, IPR2014-00525. After a subsidiary of Microsoft Corpora- tion bought Nokia’s wireless-devices-and-services busi- ness, Microsoft filed its own petition for inter partes review of the patent, which the Board instituted as IPR2015-00074. The Board then joined Microsoft’s IPR to ZTE’s, and Microsoft agreed to “proceed solely on the grounds, evidence, and arguments advanced” in ZTE’s petition. J.A. 484. We hereafter refer simply to ZTE when discussing the joint positions of ZTE and Microsoft.
In a final written decision covering both IPRs, the Board determined that all of the challenged claims are unpatentable for obviousness. ZTE Corp. v. IPR Licens- ing, Inc. , No. IPR2014-00525, 2014 WL 10405879, at *18 (P.T.A.B. Sept. 14, 2015). On appeal, IPRL contends that the Board misconstrued the term “plurality of assigned physical channels,” which is present in all of the chal- lenged claims, and relied оn hindsight in its analysis of claim 8. IPRL also contends that the Board violated the Administrative Procedure Act by relying on arguments made by ZTE for the first time in reply in the IPRs. We have jurisdiction under 28 U.S.C. § 1295(a)(4)(A).
As to all claims except claim 8, we affirm. We agree with the Board’s claim construction, and we hold that IPRL suffered no prejudice from any change of position by ZTE. We conclude, however, that substantial evidence does not support the Board’s articulated motivation to combine the asserted references to arrive at the invention defined in claim 8. We therefore vacate the Board’s decision holding claim 8 unpatentable, and we remand.
I
The ’244 patent describes a wireless access device that can automatically switch from a long-range, low-speed, cellular wirеless network to a short-range, high-speed, wireless local area network (W-LAN) when a W-LAN is in range and can “revert[] to connecting to the long range network only when out of range of the W-LAN base sta- tions.” ’244 patent, col. 2, lines 63–67. When there is “relatively low utilization of the [cellular] wireless chan- nel,” such as when the device is connected to a W-LAN, the device will release the physical layer wireless channel of the cellular connection “while maintaining the appear- ance of a network layer connection to the higher level protocols.” Id. , col. 4, lines 14–18. Such “spoofing,” id. , col. 4, lines 29–30, “frees wireless channel bandwidth for use by other subscriber units, without the overhead associated with having to set up an end to end connection each time that data needs to be transferrеd” and means that “the bandwidth necessary to provide a temporary but very high speed connection is available at critical times,” id. , col. 4, lines 19–26.
Claim 1 is representative of all claims except claim 8: 1. A subscriber unit comprising: a cellular transceiver configured to communicate with a cellular wireless network via a plurality of assigned physical channels; an IEEE 802.11 transceiver configured to com- municate with an IEEE 802.11 wireless local area network; and
a processor configured to maintain a communica- tion session with the cellular wireless network in an absence of the plurality of assigned physical channels while the IEEE 802.11 transceiver com- municates packet data with the IEEE 802.11 wireless local area network.
’244 patent, col. 11, lines 6–16.
8. The subscriber unit of claim , wherein the cel- lular wireless network is a code division multiple access (CDMA) wireless network, and the cellular transceiver is a cellular code division multiple ac- cess (CDMA) transceiver.
Id. , col 11, lines 39–42.
The Board held that all challenged claims are un- patentable for obviousness over a combination of U.S. Patent No. 6,243,581 to Jawanda (Jawanda); the General Packet Radio Service Standards published by the Europe- an Telecommunications Standards Institute in 1998 (GPRS Standards); and the IEEE 802.11 Standard (used for Wi-Fi).
II
The Board construed “plurality of assigned physical
channels” to mean “plurality of physical channels made
available for use by the subscriber unit,” without a re-
quirement that the subscriber unit select the channel for
use.
ZTE
,
A
IPRL complains that the Board relied on a new con-
struction presented by ZTE in its reply, thereby denying
IPRL an adequate opportunity to respond, in violation of
the APA.
See Dell Inc. v. Acceleron, LLC
,
In its petition, ZTE proposed that the term “plurality of assigned physical channels” should be construed to mean “plurality of physical channels available for the subscriber unit to select for use.” J.A. 296. The focus of its claim construction argument appeared to be that the specification uses “assign” to mean something different from “allocate” and that “a subscriber unit cannоt use (allocate) a resource (physical channel) until it has been made available (assigned) to the subscriber unit.” J.A. 297. In its response, IPRL agreed to the language pro- posed by ZTE, explaining that, under that construction, it is the subscriber unit that selects among the assigned channels. On reply, ZTE “clarified” that, in using the word “select,” it had not intended to limit the claims to subscriber units that choose a subset of the avаilable channels or make any affirmative choice beyond the decision to use or not to use the batch of assigned chan- nels. While the petition might be read to assert that “select for use” means that the subscriber unit must be able to exercise discretion as to which channels it uses, we doubt that the petition must be so read.
But we need not decide that question. Even if the re- ply did contain a new argument, IPRL has not shown how it was prejudiced by the Board’s refusal to allow it to respond. Although it agreed with the language of ZTE’s proposed construction, IPRL made detailed arguments to the Board (in its patent owner’s response) in favor of that construction and in support of interpreting the construc- tion to require that the subscriber unit of claim 1 be “selecting” channels for use. And this claim-construction issue is decided de novo in this court, where IPRL has had a full opportunity to argue for its preferred construction, without any possible confusion about the position it is opposing. There is no issue here about the application of the construction, and so there is no prejudice from the Board’s adoption of this construction even if we assume that ZTE changed course. The only question we nеed decide, therefore, is the correctness of the claim construc- tion.
This court’s decision in
SAS Institute, Inc. v. Comple-
mentSoft, LLC
,
B
The Board gives a claim its broadest reasonable in-
terpretation in light of the specification. 37 C.F.R.
§ 42.100(b);
Cuozzo Speed Techs., LLC v. Lee
, 136 S. Ct.
2131, 2142 (2016). This is so regardless of whether a
district court has already construed the claims.
PPC
Broadband, Inc. v. Corning Optical Commc’ns RF, LLC
,
815 F.3d 747, 756 (Fed. Cir. 2016). While the Board in
the present case noted expert testimony put forth by ZTE,
it did not rely on any such testimony in construing the
claim. Therefore, we review the Board’s construction
de
novo
.
See Teva Pharm. USA, Inc. v. Sandoz, Inc.
, 135 S.
Ct. 831, 841 (2015);
D’Agostino v. MasterCard Int’l, Inc.
,
We agree with the Board that its construction is the broadest reasonable one. IPRL accepts that “the ‘sub- scriber unit,’ which is ‘configured’ to communicate with a cellular network, is ‘assigned’ a set of ‘physical channels’ by the bаse station.” Appellant’s Br. 26. IPRL contends, however, that all the claims also require the subscriber unit to be able to “select for use” a certain subset of the physical channels—in other words, that the subscriber unit of the invention must be able not just to choose whether to use the assigned channels or not, but to exer- cise discretion over how many of the assigned channels to use. See Appellant’s Reрly 6 (“[T]he subscriber unit must be able to decide which of the channels (some or all) to use, rather than being required to use (or not use) all of the channels assigned by the base station.”). We disagree.
The language of claim 1 speaks only of “assigned” physical channels. It says nothing about allocation, selection for use, or what happens to those channels after they are assigned.
The sрecification does not compel IPRL’s allocation position. One passage states: “For example a bandwidth management function may make only a certain number of channels 30 available at any time. A subset of the availa- ble channels is selected, and then the optimum num- ber of bits for each subframe intended to be transmitted over respective one of the сhannels, is then chosen.” ’244 patent, col. 7, lines 24–29. But there is no good enough reason to read that sentence into the claims, under a broadest-reasonable-interpretation standard, and require that the subscriber units always can choose a subset of channels. The sentence describes choosing a subset of channels as a mere “example” of what the bandwidth management function “may” do. Another passage dis- cusses “allocation” at some length in describing Figure 6, id. , col. 9, line 64, through col. 10, line 43, but it does not clearly speak of subscriber units’ choice to use only some, not all, of the assigned channels; it contains no “present invention requires” or comparably limiting language; and the bottom of column 10 summarizes the written descrip- tion as showing mere “preferred embodiments,” id. , col. 10, lines 65–66. Another IPRL-cited passage, from ’244 patent, col. 4, lines 22–26, is similarly unpersuasive because it appears in a description of “one preferred embodiment,” id. , col. 4, line 5. The specification thus does not demand a broadest reasonable interpretation, of a claim not referring to allocation, that requires a sub- scriber unit capable of exercising discretion in channel allocation.
Claim 15 confirms that claim 1 does not require the subscriber unit to exercise such discretion. That claim reads: “The subscriber unit of claim 1 , wherein the pro- cessor is further configured to allocate and deallocate at least one of the plurality of assigned physical channels.” ’244 patent, col. 12, lines 1–3. IPRL points to that claim as showing that the subscribеr unit must “select for use” some of the assigned channels. But the doctrine of claim differentiation would suggest the opposite: that if the subscriber unit must be capable of allocating channels in claim 15, it cannot be required to be so capable in claim 1 or the claims would be the same. IPRL has not argued for the patentability of claim 15 separately from claim 1. At oral argument, IPRL posited that claim 15 further limits claim 1 not by requiring allocation, but by limiting what is doing the allocating—namely, the processor as opposed to the transceiver. See Oral Arg. 5:30–6:15, http://oralarguments.cafc.uscourts.gov/default.aspx?fl=20 16-1374.mp3. Not only is this argument new, it is uncon- vincing: The specification does not refer to a processor, but it describes the “bandwidth management functionali- ty,” which does the allocating, аs being part of the “proto- col converter,” ’244 patent, col. 6, lines 23–29, which itself is separate from the transceivers, id. , col. 5, lines 6–8 (“The interface 24 in turn provides data to a protocol converter 25 , which in turn provides data to a multichan- nel digital transceiver and antenna 27 .”). As the only structures named in claim 1 are the processor and the transceivers, and the specification does not show any examples of the transceivers allocating bandwidth, the nаtural reading of claim 15 is that it is further limiting claim 1 to include the ability to “allocate and deallocate at least one of the plurality of assigned physical channels.”
We therefore affirm the Board’s construction of “plu- rality of assigned physical channels” to mean “plurality of physical channels made available for use by the subscrib- er unit.”
III
We review the ultimate question of obviousness
de
novo
, and we review underlying factual findings, includ-
ing the “рresence or absence of a motivation to combine or
modify with a reasonable expectation of success,” for
substantial evidence.
Ariosa Diagnostics v. Verinata
Health, Inc.
,
A
As to all of the claims except claim 8, the parties agree that the Board’s obviousness determination, based on its finding that the prior art discloses a “plurality of assigned physical channels,” stands if its claim construc- tion is cоrrect. Because we affirm the Board’s construc- tion, we also affirm its holding that claim 1 and the claims it represents—claims 2–7, 14–16, 19–29, 36–38, and 41–44—are unpatentable for obviousness. [2]
B
Claim 8 requires separate consideration. It claims “[t]he subscriber unit of claim 1 , wherein the cellular wireless network is a code division multiple access (CDMA) wireless network, and the cellular transceiver is a cellular сode division multiple access (CDMA) trans- ceiver.” ’244 patent, col. 11, lines 39–42. As a dependent claim, it incorporates all of the limitations of claim 1, including the limitation that the subscriber unit “main- tain a communication session with the cellular wireless network in an absence of the plurality of assigned physi- cal channels.” Id. , col. 11, lines 12–14. The Board, in its obviousness analysis for claim 1, held that Jawanda did not disclose “maintain[ing] a communication session” as that term was construed; rather, it concluded, the GPRS standards disclosed that limitation in the form of the Packet Data Protocol (PDP) Context feature, and Ja- wanda and the GPRS standards would be combined along with the IEEE 802.11 standard. ZTE , 2014 WL 10405879, at *12–15.
The Board then seemed to hold that claim 8 would have been obvious because “Jawanda explicitly states that the wireless dаta connections could be provided by a code division multiple access (CDMA) network.” Id. at *18 (quoting Pet’r’s Reply 13) (internal quotation marks omitted). The logic of the Board’s analysis is wanting.
As noted, the Board found earlier that Jawanda did not disclose “maintain[ing] a communication session” at all: the Board relied wholly on the GPRS standard for that limitation. Moreover, the Board cited no prior-art rеference that discloses that CDMA networks at the time of the invention could “maintain a communication ses- sion” according to the claims. Accordingly, the Board must have held that it would have been obvious to com- bine the PDP Context feature of the GPRS standard that enables the subscriber unit to “maintain a communication session” with a CDMA network. We do not see the sup- port for that inference. Jawanda’s disclosure that “[f]or data connections, such wireless signals can be transmit- ted according to any currently available or future wireless data protocol such as code division multiple access (CDMA), CDPD, or GPRS,” Jawanda, col. 3, lines 6–9 (emphasis added), on its face discloses GPRS and CDMA as alternative protocols; and it does not suggest that any aspects of the GPRS standard (much less the speсific functions corresponding to the disputed ’244 patent limitations) should be incorporated into a CDMA stand- ard. In other words, the suggestion in Jawanda to com- bine Jawanda with GPRS or CDMA is not a suggestion to combine Jawanda and specific features of GPRS with CDMA.
Aside from the cited passage in Jawanda, the only ev- idence that the Board cited in its discussion of claim 8 that could be interpreted as а motivation to combine is testimony by Dr. Stark, IPRL’s expert, admitting that “the GPRS network layer protocols (such as the PDP context) were eventually incorporated into CDMA air interface systems, such as WCDMA.” ZTE , 2014 WL 10405879, at *18 (quoting Pet’r’s Reply 14) (internal quotation marks omitted). While that testimony may establish that, at some point, there was a reason to com- bine the PDP Context feature with CDMA protocols, it does not provide that reason or show why the references cited or the knowledge of one of skill in the art at the time of the invention would motivate a skilled artisan to alter the standards with a reasonable expectation of success. Nor does Dr. Stark’s testimony establish that, at the time of the invention, the CDMA standard already included the “maintain a communication session” limitation.
Finally, the Board reasoned that “Petitioner argues
persuasively that ‘Patent Owner has advanced no evi-
dence to suggest that employing the cited GPRS function-
ality in a CDMA-based system such as Jawanda discloses
would have been beyond the level of ordinary skill at the
relevant time.’”
Id.
(quoting Pet’r’s Reply 14). But in
addition to seeming to shift the burden of proof, that is a
statement about what skilled artisans could have done if
motivated, not what they would have been motivated to
do. Proof of the latter is needed.
See Personal Web
Techs., LLC v. Apple, Inc.
,
IPRL does not contend that the record is so clearly devoid of any possible motivation to combine that outright reversal is warranted. Oral Arg. at 12:00–13:40, http://oralarguments.cafc.uscourts.gov/default.aspx?fl=20 16-1374.mp3. Because the record might contain substan- tial evidence to support a motivation to combine the PDP Context feature of the GPRS standards with the CDMA network referenced in Jawanda, we vacate the Board’s decision with respect to claim 8 and remand for further proceedings. [3]
IV
For the foregoing reasons, we affirm the determina- tions of unpatentability of claims 1–7, 14–16, 19–29, 36– 38, and 41–44. We vacate the determination of unpatent- ability of claim 8 and remand for further proceedings.
No costs. AFFIRMED IN PART, VACATED IN PART, AND
REMANDED
Notes
[1] The Board also construed the term “maintain a
communication session with the cellular wireless network
in an absence of the plurality of assigned physical chan-
nels” to mean “maintain a logical connection with the
cellular wireless network when none of the plurality of
physical channels are in use by the subscriber unit.”
ZTE
,
[2] That disposition is unaffected by the several broad challenges to thе IPR scheme that IPRL has included in its brief. As IPRL agrees, those challenges are foreclosed by governing precedents.
[3] Because we remand as to claim 8 on the merits, we need not decide whether the Board relied on new arguments raised on reply. On remand, the Board should evaluate whether the parties had notice and an oppor- tunity to respond to the grounds it ultimately relies on.