Megaphone

Details Megaphone Megaphone

1997-12-04

1998-12-08

Shooman, Ted

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Public address system

1403

Patent

active

D04022904

REFERENCES:
patent: D303530 (1989-09-01), Bear
patent: D338464 (1993-08-01), Darby
patent: 2981359 (1961-04-01), Carlisel
patent: 5094317 (1992-03-01), Ladendorf

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