Timer with sound and light activation

Details Timer with sound and light activation Timer with sound and light activation

1986-09-09

1988-11-08

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Time-measuring instrument or casing

Patent

active

D02984172

REFERENCES:
patent: D216017 (1969-11-01), Podall
patent: D260495 (1981-09-01), VonGunten
patent: D282826 (1986-03-01), Hoogner
patent: D282827 (1986-03-01), Hoogner
patent: D288177 (1987-02-01), Yang
patent: 4588901 (1986-05-01), Maclay

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