Flip up telescopes for spectacles

Details Flip up telescopes for spectacles Flip up telescopes for spectacles

1996-02-12

1997-11-04

Barkai, Raphael

Photography and optical equipment

Ophthalmic article

Element or attachment

1606

Patent

active

D03858995

REFERENCES:
patent: D235800 (1975-07-01), Van Exel
patent: D345368 (1994-03-01), Clark et al.
patent: 2414757 (1947-01-01), Mitby et al.
patent: 2422661 (1947-06-01), Ellis
patent: 2758506 (1956-08-01), McNeill
patent: 4865438 (1989-09-01), Wada
patent: 5076682 (1991-12-01), Pasfield
patent: 5381263 (1995-01-01), Nowak et al.
patent: 5446507 (1995-08-01), Chang

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