Typewriter keyboard musical instrument

Details Typewriter keyboard musical instrument Typewriter keyboard musical instrument

1991-11-08

1994-03-08

Ansher, Bernard

Musical instruments

Keyboard type

Combined with diverse article

D18 2, D21 64, D21111, 84423B

Patent

active

D03449718

REFERENCES:
patent: D208925 (1967-10-01), Campbell
patent: 2159491 (1939-05-01), Rose
patent: 2432527 (1947-12-01), Lang
patent: 2780127 (1957-01-01), Hennick
patent: 3093911 (1963-06-01), Hagelstein et al.
patent: 4655117 (1987-04-01), Roose
patent: 4976182 (1990-12-01), Obuchi et al.
patent: 5088378 (1992-02-01), Delatorre

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