Photography and optical equipment – Optical article not elsewhere specified – Telescope
Patent
1990-04-09
1993-03-02
Word, A. Hugo
Photography and optical equipment
Optical article not elsewhere specified
Telescope
Patent
active
D03336697
REFERENCES:
patent: D312089 (1990-11-01), Jorlov
patent: 2189964 (1940-02-01), Sealey
patent: 3023503 (1962-03-01), Baker
patent: 4249315 (1981-02-01), Hopson, III
patent: 4373269 (1983-02-01), Doliber et al.
patent: 4682091 (1987-07-01), Krewalk et al.
patent: 4709178 (1987-11-01), Burr
Dai-Ichi Kogaku Co., Ltd.
Mortimer Paula A.
Word A. Hugo
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