Walk-in multiple screen rear projection display unit

Details Walk-in multiple screen rear projection display unit Walk-in multiple screen rear projection display unit

1978-05-10

1981-03-24

Kemper, Catherine E.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D 6157, D0606, D1602

Patent

active

D02586606

REFERENCES:
patent: D209636 (1967-12-01), Busch
patent: D227599 (1973-07-01), Wisgin
patent: D249527 (1978-09-01), Stralka
patent: 3861792 (1975-01-01), Donati
patent: 3981573 (1976-09-01), Schwartz

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