Pei-Herng Hor v. Ching-Wu "Paul" Chu
699 F.3d 1331
Fed. Cir.2012Background
- Hor and Meng claim to be joint inventors of the '866 and '418 patents; Chu is the sole named inventor.
- The district court granted Chu summary judgment, holding Hor and Meng’s §256 claims barred by laches or equitable estoppel.
- Hor filed suit in 2008; Meng intervened in 2010 to assert her own §256 claim.
- The patents issued in 2006 ('866) and 2010 ('418); inventorship concerns date to 1986–1987.
- District court treated laches as accruing pre-issuance, based on §256 procedures potentially available before issuance.
- On appeal, the Federal Circuit held laches accrues at patent issuance, reversing the district court on laches and vacating/affirming other defenses as appropriate.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| When does laches accrue for §256 inventorship claims? | Hor and Meng argue accrual begins at issuance; pre-issuance knowledge cannot trigger laches. | Chu argues laches can begin pre-issuance via knowledge of omitted inventorship. | Laches accrues at patent issuance; pre-issuance knowledge does not trigger accrual. |
| Is the equitable estoppel ruling proper where not pleaded? | Hor and Meng contended estoppel was improperly found sua sponte. | Chu argued estoppel was not properly raised as a defense. | Reversed as to equitable estoppel; estoppel was not properly raised by Chu. |
| Does unclean hands bar Chu’s laches defense as to Meng? | Meng challenges laches defense not to be barred by unclean hands. | District court properly declined unclean hands to override laches. | Unclean hands defense affirmed for Meng; laches reversed on this basis. |
| Did Hor and Meng’s claims accrue before issuance, triggering a presumption of laches? | Claim accrues only after issuance; six-year delay not cognizable. | Pre-issuance knowledge can trigger laches under §256. | Presumption did not attach; laches reversed. |
Key Cases Cited
- A.C. Aukerman Co. v. R.L. Chaides Constr. Co., 960 F.2d 1020 (Fed.Cir.1992) (six-year presumption for laches in §256/inventorship claims; accrual timing)
- Advanced Cardiovascular Systems, Inc. v. SciMed Life Sys., Inc., 988 F.2d 1157 (Fed.Cir.1993) (adopts six-year laches presumption for §256 claims)
- HIF Bio, Inc. v. Yung Shin Pharm. Indus. Co., 600 F.3d 1347 (Fed.Cir.2010) (confirms §256 accrual upon patent issue)
- Chou v. Univ. of Chi., 254 F.3d 1347 (Fed.Cir.2001) (interprets §256 to protect correct inventorship)
- Sperry Rand Corp. v. Sperry Rand Corp., 444 F.2d 406 (4th Cir.1971) (historical context of §256 corrective relief; judicial rights)
- Davidson v. Grady, 105 F.2d 405 (5th Cir.1939) (general principle that laches cannot bar claim before accrual)