Multiple function image switching attachment for a telescope or

Details Multiple function image switching attachment for a telescope or Multiple function image switching attachment for a telescope or

1989-05-08

1990-09-04

Word, A. Hugo

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

D16130, D16132

Patent

active

D03103811

REFERENCES:
patent: D141692 (1945-06-01), Nemeth
patent: D253476 (1979-11-01), Schneck et al.
patent: D268768 (1983-04-01), Melsheimer et al.
patent: D272915 (1984-03-01), Feinbloom et al.
patent: D275496 (1984-09-01), Condon
patent: D276623 (1984-12-01), Feinbloom
patent: D295871 (1988-05-01), Charles
patent: 2428719 (1947-10-01), Nemeth
patent: 2753760 (1956-07-01), Braymer
patent: 2948189 (1961-08-01), Fischer
patent: 3074315 (1963-01-01), Seibel et al.
patent: 3468597 (1969-09-01), Jones
patent: 3645602 (1972-02-01), Clave et al.
patent: 3871741 (1975-03-01), Clave et al.
patent: 4143938 (1979-03-01), Feinbloom
patent: 4448500 (1984-05-01), Marling
patent: 4682091 (1987-07-01), Krewalk et al.
Sky and Telescope Magazine, Feb. 1983, bottom of p. 106, diagonal prism attachment on Questar telescope.
Clave Photo-Visual Optical Device.
Sky and Telescope Magazine, Oct. 1985, back cover, diagonal micron attachment on Celestron telescope.

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