4WEB, Inc. v. NuVasive, Inc.
3:24-cv-01021
S.D. Cal.Feb 18, 2025Background
- This is a patent infringement case in the Southern District of California between 4Web (medical device company specializing in 3D-printed spinal implants) and NuVasive (medical device company selling competing spinal implants).
- 4Web claims NuVasive's Modulus line of spinal implants infringes nine of its patents covering various aspects of web structure and implant technology.
- The Patents-in-Suit are categorized into three families: the "Web Structure Family" (improved truss implants), the "Microstrain Family" (parameters affecting bone growth stimulation), and the "Channel Patent" (channel design for improved bone integration).
- The court was tasked with resolving claim construction disputes and certain indefiniteness challenges—i.e., whether various claimed terms are sufficiently precise.
- Three groupings of disputed terms: the "Microstrain Terms," the "Central Portion Term," and the "Substantially Parallel Term."
- Both parties relied on intrinsic (claim/specificatation/prosecution history) and extrinsic evidence (experts) to support their positions.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Microstrain Terms | Terms are definite; POSITA can determine if implants meet functional limitations via known methods | Claims are indefinite: functional limitations lack objective boundaries and meaningful guidance | Not indefinite; objective boundaries exist from specification and standard measurement methods |
| Central Portion Term | Term has established meaning (middle 50% of implant); specification gives sufficient clarity | Term is ambiguous; specification fails to define objective boundaries for "central portion" | Indefinite due to ambiguity and contradictory specification examples |
| Substantially Parallel Term | Term should be given ordinary engineering meaning; courts have upheld similar usage | Term of degree with no objective limits; ambiguity in context and fabrication | Not indefinite; ordinary meaning is understandable to POSITA, no ambiguity |
| Timing of Indefiniteness Determination | No strong objection to considering indefiniteness at claim construction | Raised as appropriate to adjudicate indefiniteness during claim construction | Court chooses to resolve indefiniteness at claim construction |
Key Cases Cited
- Phillips v. AWH Corp., 415 F.3d 1303 (Fed. Cir. 2005) (claim construction methodology and emphasis on intrinsic evidence)
- Markman v. Westview Instruments, Inc., 517 U.S. 370 (1996) (claim construction is a matter of law for courts)
- Nautilus, Inc. v. Biosig Instruments, Inc., 572 U.S. 898 (2014) (standard for patent indefiniteness—reasonable certainty for skilled artisan)
- Vitronics Corp. v. Conceptronic, 90 F.3d 1576 (Fed. Cir. 1996) (uses of intrinsic and extrinsic evidence in claim construction)
- Omega Eng’g, Inc. v. Raytek Corp., 334 F.3d 1314 (Fed. Cir. 2003) (two-step patent infringement analysis)
- Halliburton Energy Servs., Inc. v. M-I LLC, 514 F.3d 1244 (Fed. Cir. 2008) (indefiniteness of patent claims with functional limitations)
- Geneva Pharms., Inc. v. GlaxoSmithKline PLC, 349 F.3d 1373 (Fed. Cir. 2003) (scope of functional claim limitations and indefiniteness)
- Deere & Co. v. Bush Hog, LLC, 703 F.3d 1349 (Fed. Cir. 2012) (definiteness of terms of degree like "substantially").