Twitter, Inc. v. Vidstream LLC
19-1708
Fed. Cir.Sep 3, 2020Background:
- Two IPRs challenged VidStream’s patents (U.S. Pat. Nos. 8,464,304 and 8,601,506) directed to a system/method for capturing user video under “predetermined constraints” provided by a server and then transcoding for distribution.
- Representative claim recites video captured by a client device "in accordance with instructions...provided to the client computing device by the server system" (disputed limitation).
- Twitter relied on Lahti (2006), which describes a mobile app (MobiCon), a server-side upload gateway, and a capture specification (H.263, 176x144, 15 fps), arguing those parameters are delivered by the app/server and thus anticipate/suggest the claimed server-defined constraints.
- VidStream argued Lahti’s capture parameters reflect native phone/3GPP defaults, not instructions from MobiCon, and that Lahti does not show the app controls capture parameters.
- The PTAB found Twitter failed to prove by a preponderance that Lahti discloses or fairly suggests the server-provided capture-parameter limitation and addressed (but did not rely on) arguments in Twitter’s reply; PTAB concluded Lahti’s parameters could equally be native device settings.
- The Federal Circuit (de novo review of obviousness) affirmed, holding the Board properly evaluated what Lahti fairly suggests and applied the correct evidentiary standard.
Issues:
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether the Board erred by considering only what Lahti expressly teaches and not what it "fairly suggests" to a POSITA | Lahti fairly suggests that MobiCon (and thus the server) supplies capture parameters (frame rate, format, resolution); industry SDKs and Symbian APIs let apps set frame rate | Lahti’s parameters are equally explained by native device/3GPP defaults; Lahti does not show MobiCon controls capture parameters | Board considered what Lahti fairly suggests, found Twitter failed to prove by a preponderance that Lahti suggests server-provided constraints, and affirmed |
| Whether the Board incorrectly analyzed Lahti as of its 2006 publication date rather than the 2011 invention date | Technological advances by 2011 (phones able to record at higher resolutions/frame rates) mean a POSITA would read Lahti as not limited to native device frame rate and would understand MobiCon could set parameters | Even considering later tech, Twitter failed to show Lahti discloses that the app (not the device) supplied the capture parameters | Board properly evaluated Twitter’s expert testimony and rejected the argument; affirming that the Board did not err in its temporal or factual analysis |
| Whether the Board improperly ignored arguments/evidence in Twitter’s reply brief | Reply introduced points about SDKs/Symbian and app control that the Board should have considered | Board considered reply arguments (and permitted sur-reply) and found them insufficient; it was not required to accept newly raised, insufficient evidence | No error: Board addressed reply materials, found the overall record insufficient, and applied the correct preponderance standard |
Key Cases Cited
- In re Kotzab, 217 F.3d 1365 (Fed. Cir. 2000) (standard of review for obviousness determinations)
- Bradium Techs. LLC v. Iancu, 923 F.3d 1032 (Fed. Cir. 2019) (prior art must be considered for what it "fairly suggests")
- In re Baird, 16 F.3d 380 (Fed. Cir. 1994) (same—scope of prior art includes what it fairly teaches)
- Velander v. Garner, 348 F.3d 1359 (Fed. Cir. 2003) (preponderance standard requires showing a fact is more probable than not)