Telephone special effects unit or similar article

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment

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D14141

Patent

active

D03162648

REFERENCES:
patent: D246042 (1977-10-01), Fossella et al.
patent: D273952 (1984-05-01), Stansbury et al.
patent: D291435 (1987-08-01), Kawano et al.
patent: D304587 (1989-11-01), Danielson et al.
patent: D308381 (1990-06-01), Dehnert
patent: D308971 (1990-07-01), Weiser et al.
patent: 3777067 (1973-12-01), Kilky
patent: 3911446 (1975-10-01), Albertini
patent: 4335278 (1982-06-01), Chee
patent: 4435623 (1984-03-01), Valentino
patent: 4517410 (1985-05-01), Williams et al.

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