496 F. App'x 36
Fed. Cir.2012Background
- Rembrandt appeals a district court judgment that resolved all infringement claims of the ’627 patent in favor of the Defendants based on a construction of a disputed term.
- The district court construed “signal point” as a point on a two-dimensional constellation with a pair of coordinates for the two components.
- The ’627 patent improves on the prior ’625 patent by interleaving 2N-dimensional channel symbols to enhance high-data-rate transmission.
- A Markman hearing addressed the scope of terms; after construction, the parties entered a stipulation for final judgment non-infringement under the proposed construction of signal point.
- Rembrandt contends the district court misread the specification and claims by limiting signal points to two dimensions, and argues for broader dimensionality.
- This court reviews claim construction de novo, viewing the claims, specification, prosecution history, and extrinsic evidence.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Proper construction of 'signal point' | Rembrandt: not limited to 2D; any dimensionality allowed | Defendants: signal point is 2D in context of the ’627 patent | 2D construction affirmed |
| Whether specification supports broader dimensionality | Rembrandt: specification admits any dimensionality | Defendants: specification confines to two-dimensional constellation | Specification limits to two-dimensional signal points; no broader reading |
| Doctrine of claim differentiation | Rembrandt: independent claims imply broader dimensionality | Defendants: differentiation does not broaden to one dimension | No controlling effect to broaden beyond 2D under the record |
| Impact of construction on other terms | Rembrandt: other terms may create genuine issues of infringement | Defendants: alternate grounds for noninfringement exist without addressing others | Court does not reach other constructions; affirms on signal point alone |
Key Cases Cited
- Phillips v. AWH Corp., 415 F.3d 1303 (Fed. Cir. 2005) (claims read in light of specification; intrinsic evidence controls)
- Markman v. Westview Instruments, Inc., 517 U.S. 370 (Supreme Court 1996) (claim construction governs interpretation of claim terms)
- Cybor Corp. v. FAS Techs., Inc., 138 F.3d 1448 (Fed. Cir. 1998) (de novo review of claim construction)
- i4i Ltd. P'ship v. Microsoft Corp., 598 F.3d 831 (Fed. Cir. 2010) (claim scope informed by specification; avoid importing embodiments)
- Edwards Lifesciences LLC v. Cook Inc., 582 F.3d 1322 (Fed. Cir. 2009) (limitations in specification may limit claims when clearly described)