Counsel registry

Bartko, Zankel, Bunzel & Miller

4 case appearances — 2 as plaintiff counsel · 2 as defendant counsel.

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

Attorneys

Further reading

District court vs. PTAB: where to fight a patent challenge
Every defendant who actually fights a patent ends up choosing — sometimes implicitly — between district court invalidity, PTAB IPR, or both in parallel. The trade-offs are not symmetric; the choice often determines the case.
Finding prior art with free tools: Google Patents, Lens, Espacenet, and more
A serious paid prior-art search costs $5,000 to $20,000. The first 80% of what you'd find is sitting behind free tools — if you know how to drive them.
Patent trolls in 2025: the year in numbers
2025 was a banner year for patent trolls — and not by accident. Filings surged while the defendant's cheapest weapon, the PTAB, was quietly taken off the table. Here's what the reporting shows, and why the two are connected.
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.
What is a patent troll?
Patent trolls are companies whose business is suing other companies. They make nothing, sell nothing, and add nothing — they collect old patents and use them to extract settlements from companies that actually do things.