Title:
【考案の名称】ビ-ムエクスパンダ-
Document Type and Number:
Japanese Patent JPS60107822
Kind Code:
U
Inventors:
Takaaki Tanaka
Youji Kubota
Youji Kubota
Application Number:
JP19499083U
Publication Date:
July 22, 1985
Filing Date:
December 20, 1983
Export Citation:
International Classes:
G02B5/02; G02B27/00; G02B27/09; (IPC1-7): G02B27/00; G02B5/02
Domestic Patent References:
| JPS58132716A | 1983-08-08 | |||
| JPS4928437B1 | 1974-07-26 |