Medtronic Inc. v. Boston Scientific Corp.
695 F.3d 1266
Fed. Cir.2012Background
- Medtronic sought a declaratory judgment of noninfringement and invalidity of MFV’s RE’119 and RE’897 reissue patents; MFV appealed the noninfringement ruling and Medtronic cross-appealed claim construction that underpinned validity.
- District court held noninfringement and that the patents were valid/enforceable; relied on burden-shifting to defendants and limited claim scope to congestive heart failure.
- LTA between MFV and Medtronic required MFV to identify products and Medtronic to pay royalties or seek a declaratory judgment; Medtronic paid royalties into escrow while challenging validity.
- Medtronic argued burden of proof lies with patentees; MFV argued burden lies with declaratory-judgment plaintiff under MedImmune-posture; court acknowledged role reversal complicates burden allocation.
- District court’s claim construction appended “for treatment of congestive heart failure” to broad terms, effectively limiting the scope; patents relate to CRT device improving cardiac conduction.
- The case is remanded for proceedings consistent with the court’s burden-allocation ruling and correct claim construction.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Burden of proof in a DJ action after MedImmune | MFV: Medtronic bears burden as DJ plaintiff | Medtronic: patentee always bears burden | Burden rests with the DJ plaintiff when license/continuing relief is involved |
| Proper claim construction scope | Medtronic: keep broader scope; no clear disavowal | MFV: limit to congestive heart failure | District court erred by limiting claims to CHF; remand for correct construction |
| Effect of license on infringement burden | Medtronic: relief hinges on noninfringement; license shields from infringement | MFV: licensing status does not alter burden in DJ action | Burden allocation rules apply; post-MedImmune context requires reassessment on remand |
| Impact of discovery and interrogatory responses on infringement proof | MFV: MFV not required to map each claim limitation to each product | Medtronic required to prove noninfringement | Because burden is on Medtronic in this DJ action, Berger’s testimony was not required to map every limitation on every product on remand |
| Doctrine of equivalents proof on remand | Not decided yet due to burden shift | N/A | Not resolved on remand; dismissed as separate from core burden issue |
Key Cases Cited
- Under Sea Indus., Inc. v. Dacor Corp., 833 F.2d 1557 (Fed. Cir. 1987) (burden of proof generally lies with patentee in infringement actions)
- In re Tech. Licensing Corp., 423 F.3d 1286 (Fed. Cir. 2005) (patentee must show all claim elements; evidentiary burdens in DJ actions)
- Tech. Licensing Corp. v. Videotek, Inc., 545 F.3d 1316 (Fed. Cir. 2007) (burden of proof in infringement actions; role of counterclaims)
- Laitram Corp. v. Rexnord, Inc., 939 F.2d 1533 (Fed. Cir. 1991) (patentee must prove every element of the claim)
- Vivid Technologies, Inc. v. American Sourcing Eng’g, Inc., 200 F.3d 795 (Fed. Cir. 1999) (role-reversal in DJ actions does not shift burden; conditions vary post-MedImmune)
- MedImmune, Inc. v. Genentech, Inc., 549 U.S. 118 (U.S. 2007) (licensee may seek declaratory judgment without ceasing royalties; BW allocation in DJ actions post-licensing)