Electronic metronome

Details Electronic metronome Electronic metronome

1988-12-08

1991-09-10

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Time-measuring instrument or casing

Metronome

D10 78

Patent

active

D03197913

REFERENCES:
patent: D257235 (1980-10-01), Cheung
patent: D260138 (1981-08-01), Chapman
patent: D269328 (1983-06-01), Cheung
patent: D298416 (1988-11-01), Rakocy
patent: D312974 (1990-12-01), Conner
patent: 3760681 (1973-09-01), Kennedy
patent: 4712019 (1987-12-01), Nilssen
patent: 4733593 (1988-03-01), Rothbart
Hong Kong Enterprise, 9/84, p. 239-Timer.

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