This Day in Patent History – On January 17, 1882, Leroy Firman received a patent for the telephone switchboard

On January 17, 1882, Leroy Firman received a patent for the telephone switchboard.

 

Patent Information
Publication number: US252576 A
Patent Title: Multiple switch-board for telephone-exchanges
Publication type: Grant
Publication date: Jan 17, 1882
Filing date: Jan 7, 1881
Priority date: Jan 7, 1881
Inventors: Leroy B Firman
Original Assignee: Leroy B Firman

US252576