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

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

PatentYogi_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

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