Attitude-director indicator

Details Attitude-director indicator Attitude-director indicator

1983-06-30

1985-08-20

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 65, D10 67, D10 68, D10 69

Patent

active

D02801876

REFERENCES:
patent: 44451 (1864-09-01), Pender
patent: D243931 (1977-04-01), Pitkin
patent: 2091963 (1937-09-01), Carlson
patent: 2502171 (1950-03-01), Pashby
patent: 2525387 (1950-10-01), Volk
patent: 3486239 (1969-12-01), Boeder

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