Document Type and Number:
Japanese Patent JPS5175240
Kind Code:
U
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Application Number:
JP15086074U
Publication Date:
June 14, 1976
Filing Date:
December 11, 1974
Export Citation:
International Classes:
G06K7/10; G02B26/12; G02B27/00; G02B27/02; G06K7/14; (IPC1-7): G02B27/17; G02B27/02; G06K7/14
Domestic Patent References:
| JPS4737445A |
Foreign References:
| US3728677A | 1973-04-17 |