Range finding device for close-up

Details Range finding device for close-up Range finding device for close-up

1985-12-27

1988-10-25

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D16 10

Patent

active

D02982609

REFERENCES:
patent: D197257 (1963-12-01), Fladlien
patent: D257259 (1980-10-01), Shiraishi
patent: 2466171 (1949-04-01), Hencke
patent: 3687030 (1972-08-01), Dine
patent: 4222654 (1980-09-01), Bodenhamer

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