Projection enclosure

Details Projection enclosure Projection enclosure

1985-03-21

1987-09-15

Kemper, Catherine E.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D20 10

Patent

active

D02918919

REFERENCES:
patent: D227599 (1973-07-01), Wisgin
patent: D228029 (1973-07-01), Conner et al.
patent: D249527 (1978-09-01), Stralka
patent: D258660 (1981-03-01), Berger et al.
patent: D284778 (1986-07-01), Clifford et al.

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