Chart for plotting navigational course

Details Chart for plotting navigational course Chart for plotting navigational course

1989-12-04

1991-10-15

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03207544

REFERENCES:
patent: D142653 (1945-10-01), Muldoon
patent: D250754 (1979-01-01), Gray
patent: 886695 (1908-05-01), Grenier
patent: 2424065 (1947-07-01), Stewart
patent: 2485674 (1949-10-01), Suiter
patent: 2557981 (1951-06-01), Larsen
patent: 2834110 (1958-05-01), Malakoff
patent: 3908274 (1975-09-01), Gerry
patent: 4512087 (1985-04-01), Jerhammar

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