Aircraft flight instrument

Details Aircraft flight instrument Aircraft flight instrument

1984-10-15

1987-07-21

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 74

Patent

active

D02909375

REFERENCES:
patent: D190968 (1961-07-01), Andres
patent: D237594 (1975-11-01), Vetter
patent: D257832 (1981-01-01), Flint
patent: 3382351 (1968-05-01), Schweighofer
patent: 3605083 (1971-09-01), Kramer
patent: 3643258 (1972-02-01), Balding
patent: 4326189 (1982-04-01), Crane
patent: 4368517 (1983-01-01), Lovering
patent: 4598292 (1986-07-01), Devino

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