Slide viewer

Details Slide viewer Slide viewer

1983-02-23

1985-08-13

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D16 15

Patent

active

D02801035

REFERENCES:
patent: D180369 (1957-05-01), Katz
patent: D199598 (1964-11-01), Lanigan
patent: D268590 (1983-04-01), Miller
patent: D268591 (1983-04-01), Miller
patent: D276240 (1984-11-01), Bonnefoy
patent: 2892274 (1959-06-01), Afton
patent: 3018575 (1962-01-01), Barre

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