Document Type and Number:
Japanese Patent JPH0427421
Kind Code:
U
Application Number:
JP6734390U
Publication Date:
March 04, 1992
Filing Date:
June 25, 1990
Export Citation:
International Classes:
G02C1/00; G02C7/10; G02C9/02; (IPC1-7): G02C9/02; G02C1/00; G02C7/10
Domestic Patent References:
| JP60096628B |