Counsel registry

Charhon, Callahan, Robson & Garza

6 case appearances — 1 as plaintiff counsel · 5 as defendant counsel.

Generating firm summary with web-search grounding — usually 30-60s. Don’t leave this page.

Attorneys

Further reading

AI prior art search tools: a 2026 buyer's guide for defendants
AI doesn't replace a patent attorney's judgment. It does replace the search step that used to cost $20,000 and take three weeks.
Mayo Collaborative Services v. Prometheus Laboratories (2012)
The two-step framework defendants now recite from memory comes from Mayo, not Alice. Mayo is the often-overlooked but doctrinally essential ancestor of every modern § 101 motion.
Declaratory judgment actions: when to flip the table on a patent troll
The patent holder is the one with the patent. They're not always the one who gets to pick the courtroom.
The first 30 days after a patent infringement complaint
Most defendants spend the first 30 days reacting. The defendants who do well spend it sequencing — because every move you make in month one shapes the budget, leverage, and exit options for the next two years.
IPR estoppel: the trade-off behind the cheapest invalidity tool
File your strongest art, file it well — or don't file at all if your strongest grounds aren't patents and publications. Estoppel is what makes IPR powerful for the system and dangerous for the defendant who underprepares.