Electronic metronome

Details Electronic metronome Electronic metronome

1988-03-04

1991-03-19

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Time-measuring instrument or casing

Metronome

Patent

active

D03155188

REFERENCES:
patent: D243748 (1977-03-01), Krause
patent: D252801 (1979-09-01), Usuda
patent: D253399 (1979-11-01), Harle
patent: D257235 (1980-10-01), Cheung
patent: D259862 (1981-07-01), You
patent: D260646 (1981-09-01), Akazawa et al.
patent: D263966 (1982-04-01), Kobayashi
patent: D269328 (1983-06-01), Cheung
patent: D279196 (1985-06-01), Kurozumi et al.
patent: D290371 (1987-06-01), Slayer et al.
patent: D293557 (1988-11-01), Bartholoman et al.
patent: 4437381 (1984-03-01), Chen

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