Document Type and Number:
Japanese Patent JPS50142035
Kind Code:
U
Application Number:
JP5360574U
Publication Date:
November 22, 1975
Filing Date:
May 11, 1974
Export Citation:
International Classes:
G03B21/00; (IPC1-7): G03B21/00
Domestic Patent References:
JPS4326711Y1 | 1968-11-06 |