Portable music tuner

Details Portable music tuner Portable music tuner

1988-11-29

1991-07-02

Feifer, Melvin B.

Musical instruments

Miscellaneous

D14299

Patent

active

D03179338

REFERENCES:
patent: D244482 (1977-05-01), Ishida
patent: D281600 (1985-12-01), Claxton et al.
patent: D290371 (1987-06-01), Slayer et al.
patent: D304192 (1989-10-01), Hayasaka et al.
patent: D305024 (1989-12-01), Nishiyori et al.
patent: D311188 (1990-10-01), Oyamada et al.

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