Sources

Every source cited anywhere on this site. Government and regulatory sources set the rules; company-published sources state what a company says about itself and are labeled that way.

1. Chambers and Partners — Intellectual Property, USA Chambers and Partners
   An independent legal directory that ranks U.S. IP firms in bands from client and peer research.
2. The Legal 500 — United States, intellectual property practice areas The Legal 500
   An independent legal directory that tiers U.S. IP firms by practice area.
3. Wysebridge — Patent law firm directory Wysebridge (publisher of this site)
   U.S. patent law firms, browsable by state, built from USPTO practitioner data.
4. USPTO — Find a patent practitioner USPTO
   The USPTO's own search of registered patent attorneys and agents.
5. USPTO — Finding a patent practitioner USPTO
   USPTO guidance on finding and verifying a registered patent attorney or agent.
6. AIPLA 2025 Report of the Economic Survey American Intellectual Property Law Association
   The IP bar's own biennial survey of income and billing rates. Paid: $495 for non-members; free online to members.
7. Wysebridge Intelligence — Patent attorneys and agents by state Wysebridge (publisher of this site)
   Registered practitioner counts by state as of September 2026, built from monthly USPTO roster files.