Diaphragm device

Details Diaphragm device Diaphragm device

1989-12-04

1990-11-27

Gellner, Michael L.

350449, G03B 902

Patent

active

049740016

ABSTRACT:
A diaphragm device in which the aperture of a diaphragm opening is variable from a minimum aperture to a fully open aperture comprises:

REFERENCES:
patent: 4897682 (1990-01-01), Kuwana

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