Document Type and Number:
Japanese Patent JPS5161833
Kind Code:
A
Inventors:
IBUSAWA TSUKUMO
Application Number:
JP13642474A
Publication Date:
May 28, 1976
Filing Date:
November 26, 1974
Export Citation:
Assignee:
ASAHI OPTICAL CO LTD
International Classes:
G03B7/093; G03B9/62; (IPC1-7): G03B7/08; G03B9/62
Domestic Patent References:
| JPS4831941A | 1973-04-26 | |||
| JP46030015A |