Motor controlled focussing attachment for telescopes

Details Motor controlled focussing attachment for telescopes Motor controlled focussing attachment for telescopes

1984-04-05

1986-11-11

Lucas, Susan J.

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

D16136

Patent

active

D02866447

REFERENCES:
patent: D175503 (1955-09-01), Gottschalk et al.
patent: D175706 (1955-10-01), Bednarz
patent: D178767 (1956-09-01), Degrave, Jr.
patent: 1792171 (1931-02-01), Kruening

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