Altitude/vertical speed indicator

Details Altitude/vertical speed indicator Altitude/vertical speed indicator

1978-05-01

1981-01-13

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 74, D1005

Patent

active

D02578328

REFERENCES:
patent: D192444 (1962-03-01), McClellan
patent: 3890614 (1975-06-01), Argetieri
patent: 3936797 (1976-02-01), Andresen
patent: 4008618 (1977-02-01), Youngkin

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