Surveying instrument

Details Surveying instrument Surveying instrument

1976-07-15

1978-05-30

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

356146, D10 61, D1004

Patent

active

D02480182

REFERENCES:
patent: D227298 (1973-06-01), Mathis
patent: D231261 (1974-04-01), Allesson
patent: D236593 (1975-09-01), Katayama
patent: 434950 (1890-08-01), Pratt
patent: 1025911 (1912-05-01), Gasser
patent: 1788830 (1931-01-01), Grone
patent: 2521872 (1950-09-01), Radewald
patent: 2764054 (1956-09-01), Etienne
patent: 3348448 (1967-10-01), Callahan

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