Breakdown level

Details Breakdown level Breakdown level

1989-06-27

1991-08-13

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03190293

REFERENCES:
patent: 716001 (1902-12-01), Desmarais
patent: 759594 (1904-05-01), Crawford
patent: 950199 (1910-02-01), Young
patent: 1130610 (1915-03-01), Kane
patent: 1132318 (1915-03-01), Feder
patent: 1605604 (1926-11-01), Nerbon
patent: 1655766 (1928-01-01), Hilderbrant
patent: 2720709 (1955-10-01), Stankawitz
patent: 2807888 (1957-10-01), Thomas
patent: 2833054 (1958-05-01), Wheeler
patent: 3522657 (1970-08-01), Metrulus
patent: 3820249 (1974-06-01), Stone
patent: 4590680 (1986-05-01), Hanchett et al.

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