Combined mask and optics supporting tube assembly for night visi

Details Combined mask and optics supporting tube assembly for night visi Combined mask and optics supporting tube assembly for night visi

1976-10-18

1978-11-21

Burke, Wallace R.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D16 83, D1606

Patent

active

D02503417

REFERENCES:
patent: 2316164 (1943-04-01), Hoffeditz
patent: 2625855 (1953-01-01), Gaylor
patent: 3414347 (1968-12-01), Stoltze
patent: 3597041 (1971-08-01), Frantz et al.
patent: 3781560 (1973-12-01), DeBurgh et al.

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