Document Type and Number:
Japanese Patent JPH01142921
Kind Code:
U
Application Number:
JP3885688U
Publication Date:
September 29, 1989
Filing Date:
March 23, 1988
Export Citation:
International Classes:
A63B33/00; G02C3/00; (IPC1-7): G02C3/00; A63B33/00
Domestic Patent References:
| JPS263757Y1 | ||||
| JP53063235B |