Baseball shaped transparency viewer

Details Baseball shaped transparency viewer Baseball shaped transparency viewer

1998-10-13

2000-02-22

Aronovich, Adir

Photography and optical equipment

Projector or viewer

Integrated unit

D9307, D21713, 1602

Patent

active

D04210352

REFERENCES:
patent: D88289 (1932-11-01), Hawes
patent: D153602 (1949-05-01), Halbriter
patent: D232957 (1974-09-01), Kahelin
patent: D339239 (1993-09-01), Perkins
patent: D383979 (1997-09-01), Tucker
patent: D392467 (1998-03-01), Oldham
patent: D401605 (1998-11-01), Shirley
patent: 3707052 (1972-12-01), Clark

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