Space time clock

Details Space time clock Space time clock

1993-09-07

1995-05-02

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Case having geometric configuration in front elevation

Patent

active

D03578712

REFERENCES:
patent: D198536 (1964-06-01), Dold
patent: D198700 (1964-07-01), Wachter
patent: D203760 (1966-02-01), Morris
patent: D224033 (1972-06-01), Strong
patent: D240210 (1976-06-01), Buckingham
patent: D351355 (1994-10-01), Kaneko
patent: D351356 (1994-10-01), Kaneko
patent: 557173 (1896-03-01), Thompson
patent: 4583864 (1986-04-01), Graves
patent: 4759002 (1988-07-01), Cash
patent: 4979155 (1990-12-01), Tung

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