Digital exposure meter

Details Digital exposure meter Digital exposure meter

1978-03-31

1981-05-12

Kemper, Catherine E.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1605

Patent

active

D02591987

REFERENCES:
patent: 2472381 (1949-06-01), McMaster
patent: 3709615 (1973-01-01), Blakeslee et al.

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