Light meter

Details Light meter Light meter

1978-03-13

1981-01-13

Kemper, Catherine E.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1605

Patent

active

D02578514

REFERENCES:
patent: 2879691 (1959-03-01), Faulhaber
patent: 3709615 (1973-01-01), Blakeslee

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