Rear-projection lectern

Details Rear-projection lectern Rear-projection lectern

1984-04-20

1987-03-03

Zarfas, Louis S.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

Patent

active

D02885719

REFERENCES:
patent: D202830 (1965-11-01), Paull
patent: D219919 (1971-02-01), Cargill
patent: D220658 (1971-05-01), Christoffersen et al.
patent: D229716 (1973-12-01), Shirley
patent: D234009 (1974-12-01), Corderman et al.
patent: 3169442 (1965-02-01), Reddle et al.
patent: 4379312 (1983-04-01), Lee

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