Astronomical time clock

Details Astronomical time clock Astronomical time clock

1993-12-10

1995-07-18

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Combined

D10 28X, D10 23X

Patent

active

D03603652

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patent: 4671669 (1987-06-01), Graves
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patent: 5197043 (1993-03-01), Strader
patent: 5269065 (1993-12-01), Ida

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