Christopher T. Gresalfi
Associate
Litigation
Christopher T.
Gresalfi
Christopher T.
Gresalfi
Associate
Litigation
Christopher advises clients across a range of complex technologies, including telecommunications, wireless systems, networking, fintech, semiconductors, video technologies, and mechanical devices. Leveraging his technical background in physics and prior experience as a patent prosecutor with an active docket, he focuses his practice on patent litigation.
Christopher has represented clients in federal district courts, as well as before the U.S. Court of Appeals for the Federal Circuit, International Trade Commission, and the Patent Trial and Appeal Board. His litigation experience spans all phases of a case, including pre-suit investigations, fact and expert discovery, claim construction, dispositive motion practice, and hearings. He has secured favorable outcomes for clients through early-stage motion practice, claim construction, and PTAB proceedings.
In addition to litigation and patent prosecution, Christopher has experience with licensing, portfolio analysis, as well as litigation involving trade secret misappropriation, trademarks, copyrights, and related infringement disputes.
Prior to joining Fenwick, Christopher was an associate at international law firms and a boutique firm specializing in intellectual property.
- Represented a fintech company in the Western District of Texas and before the PTAB in patent infringement matters relating to peer-to-peer transactions. Obtained invalidation of all asserted patents; four found indefinite at claim construction and affirmed on appeal, and one invalidated in an inter partes review.
- Secured a favorable settlement for an electronic device manufacturer in patent infringement litigation relating to Wi‑Fi 6 standards in the Eastern District of Texas.
- Obtained dismissal of a patent case for a networking technology client in the Eastern District of Texas following offensive discovery.
- Obtained dismissal of patent infringement claims against a fintech client in the Northern District of California following invalidation of the asserted patents for indefiniteness.
- Represented an internet advertising company in patent litigation in the Middle District of Florida. Secured invalidation of all asserted claims under 35 U.S.C. § 101 on a Rule 12(c) motion, affirmed by the Federal Circuit.
- Represented an internet advertising company in patent litigation in the Middle District of Florida. All asserted patents were invalidated under a § 101 in a 12(c) motion. This was affirmed by the Federal Circuit.
*Includes experience from previous firms
- Represented a fintech company in the Western District of Texas and before the PTAB in patent infringement matters relating to peer-to-peer transactions. Obtained invalidation of all asserted patents; four found indefinite at claim construction and affirmed on appeal, and one invalidated in an inter partes review.
- Secured a favorable settlement for an electronic device manufacturer in patent infringement litigation relating to Wi‑Fi 6 standards in the Eastern District of Texas.
- Obtained dismissal of a patent case for a networking technology client in the Eastern District of Texas following offensive discovery.
- Obtained dismissal of patent infringement claims against a fintech client in the Northern District of California following invalidation of the asserted patents for indefiniteness.
- Represented an internet advertising company in patent litigation in the Middle District of Florida. Secured invalidation of all asserted claims under 35 U.S.C. § 101 on a Rule 12(c) motion, affirmed by the Federal Circuit.
- Represented an internet advertising company in patent litigation in the Middle District of Florida. All asserted patents were invalidated under a § 101 in a 12(c) motion. This was affirmed by the Federal Circuit.
*Includes experience from previous firms
Recognition Recognition Recognition
Recognition Recognition Recognition
The Best Lawyers in America
2025–2026
Named Christopher to its Ones to Watch list for Litigation – Patent (2026) and Litigation – Intellectual Property (2025–2026)
Patexia
2026
Ranked among top 250 attorneys in its Patent Litigation Report
The Best Lawyers in America
2025–2026
Named Christopher to its Ones to Watch list for Litigation – Patent (2026) and Litigation – Intellectual Property (2025–2026)
Patexia
2026
Ranked among top 250 attorneys in its Patent Litigation Report