Kaleidoscopic projector

Details Kaleidoscopic projector Kaleidoscopic projector

1976-02-11

1977-09-06

Burke, Wallace R.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1602

Patent

active

D02457016

REFERENCES:
patent: D236380 (1975-08-01), Topfer
patent: D240460 (1976-07-01), Simonelli
patent: 3011392 (1961-12-01), Prochazka
patent: 3255661 (1966-06-01), Marban
patent: 3894797 (1975-07-01), Barowski et al.

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