Blackbird Tech LLC v. Elb Electronics, Inc.
895 F.3d 1374
Fed. Cir.2018Background
- Blackbird Tech owns U.S. Patent No. 7,086,747 directed to energy-efficient lighting apparatuses, including an embodiment (Fig. 5) for retrofitting existing fixtures by securing an "attachment surface" of a housing to a ballast cover.
- Claim 12 (apparatus claim) recites a housing with an attachment surface and an illumination surface, illumination holes and LEDs, and "a fastening mechanism for securing the attachment surface to the illumination surface." The preamble describes the apparatus as "for retrofit with an existing light fixture having a ballast cover."
- Parties disputed construction of "attachment surface": Blackbird urged "layer of the housing to which the illumination surface is secured;" Defendants urged "layer of the housing that is secured to the ballast cover and to which the illumination surface is secured."
- The district court construed the term to require the attachment surface be "secured to the ballast cover," leading Blackbird to stipulate noninfringement; judgment entered for defendants.
- The Federal Circuit majority reversed, holding the claim language and prosecution history do not require the attachment surface to be secured to the ballast cover and adopting Blackbird’s construction; the case was vacated and remanded. Costs awarded to Blackbird.
- Judge Reyna dissented, arguing the specification, claim context (including the limiting preamble and related method claim), and every embodiment show the attachment surface is necessarily secured to the ballast cover to effect the retrofit function.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether "attachment surface" must be secured to the ballast cover | Blackbird: term means the housing layer to which the illumination surface is secured; claim does not require fastening to ballast cover | Defendants: preamble + specification require attachment surface be secured to ballast cover to achieve "retrofit" | The court held "attachment surface" does not require being secured to the ballast cover; adopted Blackbird's construction |
| Whether specification’s embodiment fastener should be read into claim | Blackbird: embodiment mention of a fastener is non-limiting and generic (adhesive, magnet, clips, screws) so should not be imported | Defendants: embodiment and preamble show retrofit function requiring fastening to ballast cover; read-in is appropriate | The court refused to import the embodiment’s ballast-cover fastener into claim scope |
| Effect of prosecution history amendment deleting "ballast cover" from claim | Blackbird: amendment removed the ballast-cover fastening requirement to overcome examiner’s issues, so history disclaims that limitation | Defendants: amendment ambiguous (done for §112) and insufficient to change scope | The court treated the prosecution amendment as dispositive—deletion showed the limitation was removed, supporting Blackbird |
| Whether apparatus claim must recite installation means | Blackbird: apparatus claim is structurally complete; need not include installation elements | Defendants: retrofitting apparatus implies attachment to fixture; claim context requires how to retrofit | The court held an apparatus claim need not recite installation; construction limited to Blackbird’s formulation |
Key Cases Cited
- Poly-Am., L.P. v. API Indus., Inc., 839 F.3d 1131 (Fed. Cir.) (claim construction reviewed using intrinsic evidence)
- Thorner v. Sony Comput. Entm't Am. LLC, 669 F.3d 1362 (Fed. Cir.) (claim terms given ordinary meaning to a skilled artisan)
- Luminara Worldwide, LLC v. Liown Elecs. Co., 814 F.3d 1343 (Fed. Cir.) (disavowal examples where specification calls something "the present invention")
- X2Y Attenuators, LLC v. Int'l Trade Comm'n, 757 F.3d 1358 (Fed. Cir.) (discussing disavowal and specification labeling)
- Regents of Univ. of Minn. v. AGA Med. Corp., 717 F.3d 929 (Fed. Cir.) (Summary of the Invention can limit claims when it identifies essential features)
- Verizon Servs. Corp. v. Vonage Holdings Corp., 503 F.3d 1295 (Fed. Cir.) (prosecution-statements-based disavowal examples)
- Honeywell Int'l, Inc. v. ITT Indus., Inc., 452 F.3d 1312 (Fed. Cir.) (specification statements may show disavowal)
- SciMed Life Sys., Inc. v. Advanced Cardiovascular Sys., Inc., 242 F.3d 1337 (Fed. Cir.) (specification language can disclaim claim scope)
- Fenner Invs., Ltd. v. Cellco P'ship, 778 F.3d 1320 (Fed. Cir.) (prosecution history relevant to claim scope)
- Biogen Idec, Inc. v. GlaxoSmithKline LLC, 713 F.3d 1090 (Fed. Cir.) (file history captures patentee's representations on claim meaning)
- Hynix Semiconductor Inc. v. Rambus Inc., 645 F.3d 1336 (Fed. Cir.) (prosecution history used to interpret claim language)
- Arachnid, Inc. v. Medalist Mktg. Corp., 972 F.2d 1300 (Fed. Cir.) (prosecution history relevant to claim scope)
- Phillips v. AWH Corp., 415 F.3d 1303 (Fed. Cir.) (en banc) (primacy of specification and prosecution history in claim construction)
- MBO Labs., Inc. v. Becton, Dickinson & Co., 474 F.3d 1323 (Fed. Cir.) (claims have the meaning used in specification and prosecution)
- Medrad, Inc. v. MRI Devices Corp., 401 F.3d 1313 (Fed. Cir.) (it is proper to consider functions of an invention in claim meaning)
- Apple, Inc. v. Ameranth, Inc., 842 F.3d 1229 (Fed. Cir.) (claims should give meaning to all terms)