Document Type and Number:
Japanese Patent JPH0247643
Kind Code:
U
Application Number:
JP12674088U
Publication Date:
March 30, 1990
Filing Date:
September 28, 1988
Export Citation:
International Classes:
G03B27/62; G03G15/04; (IPC1-7): G03B27/62; G03G15/04
Domestic Patent References:
| JP63078942B | ||||
| JPS5339744A | 1978-04-11 | |||
| JP57116936B |
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