Navigational aid

Details Navigational aid Navigational aid

1989-05-30

1991-07-02

Dunkins, Bruce W.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03178773

REFERENCES:
patent: D201829 (1965-08-01), Marcoline
patent: D249656 (1978-09-01), Mihail
patent: D254125 (1980-02-01), Powell
patent: D266313 (1982-09-01), Fulton
patent: D271382 (1983-11-01), Stein
patent: 1145020 (1915-07-01), Hill
patent: 2404386 (1946-07-01), Levine et al.
patent: 3282501 (1966-11-01), Copeland
patent: 3471084 (1969-10-01), Titus
patent: 4011987 (1977-03-01), Check
patent: 4855577 (1989-08-01), McLain

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