1. Why Patent Litigation in New York Is a Federal Matter
U.S. .atents are federal rights. Under 28 U.S.C. § 1338(a), federal district courts have original jurisdiction over civil actions arising under federal patent law, and state courts cannot hear claims for relief arising under those patent statutes. The Patent Act separately defines infringing conduct under 35 U.S.C. § 271, including direct, induced, and contributory infringement.
A lawsuit may also contain licensing, contract, or confidentiality claims governed by other law. Those issues require separate analysis and should not be described as New York patent law merely because they accompany a federal infringement claim.
2. When Can a Patent Case Proceed in the Southern District of New York?
Federal jurisdiction does not make every federal district a proper venue. Under 28 U.S.C. § 1400(b), a patent infringement action may be brought where the defendant resides or where the defendant committed acts of infringement and has a regular and established place of business.
Corporate Residence and Patent Venue
In TC Heartland LLC v. Kraft Foods Group Brands LLC, 581 U.S. 258 (2017), the Supreme Court held that a domestic corporation “resides” under § 1400(b) in its state of incorporation. For an SDNY case, commercial activity or product sales in the district therefore do not, standing alone, establish that venue is proper.
| Issue | Question to Examine |
|---|---|
| Jurisdiction | Does the claim arise under federal patent law? |
| Venue | Does the defendant satisfy § 1400(b)? |
| Infringement | Does the accused technology meet the asserted claim limitations? |
| Remedies | What relief can the evidence support? |
Jurisdiction
- Question to ExamineDoes the claim arise under federal patent law?
Venue
- Question to ExamineDoes the defendant satisfy § 1400(b)?
Infringement
- Question to ExamineDoes the accused technology meet the asserted claim limitations?
Remedies
- Question to ExamineWhat relief can the evidence support?
3. How Courts Analyze Patent Infringement
Patent infringement does not turn simply on whether two products look alike or perform similar functions. Courts focus on the asserted patent claims and compare their limitations with the accused product or process.
Claim Construction and the Accused Technology
When the parties dispute claim language, the court may construe the relevant terms using the claims, specification, prosecution history, and other appropriate evidence. The accused technology is then compared with the properly construed claim.
A commercially similar product may present a noninfringement position if a required claim limitation is absent. When patent allegations overlap with other intellectual-property disputes, an Intellectual Property Litigation review may help separate the claims.
Invalidity and Other Defenses
Under 35 U.S.C. § 282, an issued patent is presumed valid, but an accused infringer may raise defenses including noninfringement, invalidity, and unenforceability. In Microsoft Corp. .. .4i Ltd. Partnership, 564 U.S. 91 (2011), the Supreme Court held that invalidity must be proved by clear and convincing evidence.
Prior art, prosecution history, patentability requirements, and claim scope may therefore become central to the defense. Businesses addressing patent rights outside active litigation may also need a broader Patent Law assessment.
4. What Evidence Matters in a Patent Dispute?
Patent cases often depend on technical and financial records as much as the pleadings. Once litigation is reasonably anticipated, parties should consider preserving potentially relevant information.
Depending on the dispute, relevant material may include:
- Patent prosecution records, prior art, technical specifications, source code, and engineering records;
- Documents concerning the design, manufacture, sale, importation, or use of the accused technology;
- Licensing agreements, sales records, and financial information relevant to damages; and
- Communications concerning knowledge of the patent when induced infringement is alleged.
The appropriate preservation scope depends on the asserted claims, accused technology, and issues actually in dispute.
5. What Remedies Can Follow Patent Infringement?
Under 35 U.S.C. § 284, a successful patent owner may recover damages adequate to compensate for infringement, but not less than a reasonable royalty. Depending on the evidence, damages may be based on lost profits or a reasonable royalty. Courts may also increase damages up to three times the amount found or assessed when the governing standard is satisfied.
Injunctions and the Damages Period
An infringement finding does not automatically result in a permanent injunction. Under 35 U.S.C. § 283 and eBay Inc. .. MercExchange, L.L.C., 547 U.S. 388 (2006), a patent owner seeking permanent injunctive relief must satisfy the traditional equitable requirements. An Injunction Criteria and Requirements review may provide additional context when stopping continued conduct is a litigation objective.
Timing can also affect monetary recovery. Under 35 U.S.C. § 286, damages generally cannot reach infringement committed more than six years before the complaint or counterclaim was filed. When 35 U.S.C. § 287 applies, marking and notice requirements may further limit pre-suit damages.
29 Sep, 2026
