Optical viewing apparatus

Details Optical viewing apparatus Optical viewing apparatus

1965-12-09

1978-11-07

Pendegrass, Verlin R.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

350 12, 350 36, 250333, G02B 2312

Patent

active

041247981

ABSTRACT:
1. Optical apparatus, comprising:

REFERENCES:
patent: 2946255 (1960-07-01), Bolay
patent: 2982861 (1961-05-01), Menke
patent: 3200250 (1965-08-01), Bouwers
patent: 3464757 (1969-09-01), Schmidt et al.

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