Extension attachment for a telephone earpiece

Details Extension attachment for a telephone earpiece Extension attachment for a telephone earpiece

1988-06-15

1989-12-12

Fay, Jr., Horace B.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

379452

Patent

active

D03050270

REFERENCES:
patent: D53460 (1919-06-01), Pape
patent: D101816 (1936-11-01), Marshall
patent: D216802 (1970-03-01), Kliewer
patent: D274516 (1984-07-01), Walker, Jr.
patent: D291690 (1987-09-01), Tabalnnik
patent: 1142600 (1915-06-01), Maxwell
patent: 1340601 (1920-05-01), Lohl
patent: 2313383 (1943-03-01), Kolodny

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