Inventor
KAGEYAMA TOSHIHIKO
JP10 patents
Patents
10 patentsUS5370471ADec 6, 1994
Writing tool, with eraser dispenser
KOTOBUKI & CO LTD30 citations94
US5022774AJun 11, 1991
Writing tool with eraser dispenser
KOTOBUKI & CO LTD24 citations92
US4200977AMay 6, 1980
Cutter knife
KOTOBUKI & CO LTD47 citations92
US5683191ANov 4, 1997
Writing tool
KOTOBUKI & CO LTD17 citations82
US5207522AMay 4, 1993
Knock type mechanical pencil with retractable eraser
KOTOBUKI & CO LTD10 citations82
US5062727ANov 5, 1991
Writing tool
KOTOBUKI & CO LTD12 citations81
US5700101ADec 23, 1997
Writing tool
KOTOBUKI & CO LTD4 citations73
US5236270AAug 17, 1993
Writing tool for advancing lead with eraser dispenser
KOTOBUKI & CO LTD7 citations73
US4583874AApr 22, 1986
Knock-type propelling pencil with storage cartridge
KOTOBUKI & CO LTD2 citations61
US6687959B2Feb 10, 2004
Clip attaching structure
KOTOBUKI & CO LTD0 citations41