Photography and optical equipment – Optical article not elsewhere specified – Lens or objective
Patent
1991-10-18
1993-08-03
Word, A. Hugo
Photography and optical equipment
Optical article not elsewhere specified
Lens or objective
Patent
active
D03380289
REFERENCES:
patent: D189383 (1960-11-01), Macomber
patent: D302169 (1989-07-01), Kimura et al.
patent: D303268 (1989-09-01), Yamomoto
Popular Photography, Mar. 1989, p. 10, Sigma AF 24mm.
Asahi Kogaku Kogyo K.K.
Coles Doris V.
Word A. Hugo
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