Visual aid

Details Visual aid Visual aid

2007-05-01

2007-05-01

Greene, Paula A. (Department: 2912)

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

Design Patent

active

29242389

CLAIM:
The ornamental design for visual aid, as shown and described.

REFERENCES:
patent: D178766 (1956-09-01), Cressaty
patent: 3129695 (1964-04-01), Adelman
patent: 3712712 (1973-01-01), Bosma
patent: 4137863 (1979-02-01), Anglin
patent: D265964 (1982-08-01), Henkels
patent: 4483588 (1984-11-01), Dalbo et al.
patent: 5309279 (1994-05-01), Halstead
patent: D372924 (1996-08-01), Fisherman
patent: 5663828 (1997-09-01), Knowles et al.
patent: D497377 (2004-10-01), Waggoner et al.
patent: D501781 (2005-02-01), Galli
patent: D517582 (2006-03-01), Oas

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