Registered patent attorney
William J Cassin
Firm
Benesch Friedlander Coplan & Aronoff LLP
Address
71 S. Wacker Drive
Suite 1600
Chicago, IL, 60606
US
Phone
Registered as
Registered patent attorney
Other attorneys at Benesch Friedlander Coplan & Aronoff LLP
- Thomas M DaMarioUSPTO Reg. 77142 · Chicago, IL
- Catherine T GroteUSPTO Reg. 83405 · Chicago, IL
- Lily B HoUSPTO Reg. 83760 · Chicago, IL
- Manish K. MehtaUSPTO Reg. 64570 · Chicago, IL
- Samuel J. RuggioUSPTO Reg. 74543 · Chicago, IL
- Kalpesh K ShahUSPTO Reg. 48387 · Chicago, IL
- Mircea A TipescuUSPTO Reg. 53690 · Chicago, IL
Other patent attorneys in Chicago, Illinois
- Lawrence H AaronsonMcDonnell Boehnen Hulbert & Berghoff LLP
- Dennis J AbdelnourHonigman LLP
- Holby Matthew AbernNeal, Gerber & Eisenberg LLP
- Cassandra L. AbernathyUSPTO Reg. 75330
- John AbramicSteptoe & Johnson LLP
- David Brian AbramowitzLocke Lord LLP
- Hugh A AbramsShook, Hardy & Bacon LLP
- Matthias AbrellMarshall Gerstein & Borun, LLP
Frequently asked
Frequently asked about William J Cassin
Is William J Cassin a registered patent attorney?
Yes. William J Cassin is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 65192). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is William J Cassin located?
William J Cassin's office is in Chicago, Illinois (60606). Affiliated with Benesch Friedlander Coplan & Aronoff LLP.
What firm does William J Cassin work at?
William J Cassin is listed as affiliated with Benesch Friedlander Coplan & Aronoff LLP on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact William J Cassin?
William J Cassin's office phone (per the USPTO public roster) is 312-517-9542. Verify availability and intake details directly with the firm before sending privileged materials.
Should I prepare anything before contacting a patent attorney?
Yes — most patent attorneys quote based on a brief. Persoona's intellectual property module generates a prior-art analysis, defensibility scorecard, and a draft USPTO filing package so you arrive with a brief, not a blank slate. Free to run.
Profile sourced from the USPTO OEDCI Practitioner Roster. Persoona did not provide, edit, or curate this data — every field is pulled directly from the public roster.