Ball shaped transparency viewer

Details Ball shaped transparency viewer Ball 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

D04210336

REFERENCES:
patent: D248986 (1978-08-01), Nakata
patent: D283980 (1986-05-01), Haswell
patent: D339240 (1993-09-01), Perkins
patent: D357541 (1995-04-01), Neidell
patent: D392467 (1998-03-01), Oldham
patent: D401605 (1998-11-01), Shirley
patent: D404195 (1999-01-01), Beals
patent: D408877 (1999-04-01), Sonntag et al.
patent: 3707052 (1972-12-01), Clark

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