Patent Attorney
Jonathan C Siekmann
Reg. No. 58259
Active
Not accepting new clients
Firm
Level 3 Communications, LLC
Level 3 Communications, LLC
Location
Broomfield, CO 80021
Broomfield, CO 80021
Phone
720-888-2140
720-888-2140
Registration Type
ATTORNEY
ATTORNEY
Roster
USPTO OED FY25
USPTO OED FY25
Firm and contact info reflects the FY25 roster (last updated September 25).
Attorneys may have changed firms since then — patent filings show their current firm of record.