Design for combined ruler and magnifying caliper

Details Design for combined ruler and magnifying caliper Design for combined ruler and magnifying caliper

1979-02-21

1981-06-16

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D1004

Patent

active

D02595460

REFERENCES:
patent: 65532 (1867-06-01), Bickford et al.
patent: 71953 (1867-12-01), Batchelder
patent: D220061 (1971-03-01), Kerns
patent: D246699 (1977-12-01), Pingel
patent: D248864 (1978-08-01), Yen
patent: D252615 (1979-08-01), Lopez
patent: 622569 (1899-04-01), Van Namee
patent: 1009214 (1911-11-01), Backstrom
patent: 1341435 (1920-05-01), Olsen
patent: 1797213 (1931-03-01), Marcum
Yachting-2/79-p. 81-Course Plotters at right.

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