Megaphone

Details Megaphone Megaphone

1985-12-09

1988-07-12

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 99, D21211

Patent

active

D02966913

REFERENCES:
patent: D67239 (1925-05-01), Skinner
patent: D283772 (1986-05-01), Vail
patent: 2340156 (1944-01-01), Taylor et al.
patent: 4329905 (1982-05-01), Lloyd

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