Document Type and Number:
Japanese Patent JPS546949
Kind Code:
U
Application Number:
JP7848977U
Publication Date:
January 17, 1979
Filing Date:
June 17, 1977
Export Citation:
International Classes:
G03B21/34; G03B21/36; G03B31/00; (IPC1-7): G03B31/00; G03B21/36
Domestic Patent References:
| JPS431534Y1 | 1968-01-24 |
Next Patent: JPS546950