YN

Youichi Nakazato

KC Kotobuki & Co.: 12 patents #9 of 77Top 15%
📍 Kawagoe, JP: #121 of 1,278 inventorsTop 10%
Overall (All Time): #390,719 of 4,157,543Top 10%
13
Patents All Time

Issued Patents All Time

Showing 1–13 of 13 patents

Patent #TitleCo-InventorsDate
5700101 Writing tool Shuhei Kageyama, Toshihiko Kageyama, Yoshihide Mitsuya 1997-12-23
5683191 Writing tool Shuhei Kageyama, Toshihiko Kageyama, Yoshihide Mitsuya 1997-11-04
5370471 Writing tool, with eraser dispenser Shubei Kageyama, Toshihiko Kageyama, Yoshihide Mitsuya 1994-12-06
5236270 Writing tool for advancing lead with eraser dispenser Shuhei Kageyama, Toshihiko Kageyama, Yoshihide Mitsuya 1993-08-17
5207522 Knock type mechanical pencil with retractable eraser Shuhei Kageyama, Toshihiko Kageyama, Yoshihide Mitsuya 1993-05-04
5090831 Writing instrument Hidehei Kageyama, Yoshihide Mitsuya 1992-02-25
5074694 Latch mechanism for retractable writing instruments Masuo Kubota, Shubei Kageyama, Yoshihide Mitsuya 1991-12-24
5062727 Writing tool Shubei Kageyama, Toshihiko Kageyama, Yoshihide Mitsuya 1991-11-05
5022774 Writing tool with eraser dispenser Shuhei Kageyama, Toshihiko Kageyama, Yoshihide Mitsuya 1991-06-11
5018891 Writing instrument with eraser dispenser Hidehei Kageyama, Yoshihide Mitsuya 1991-05-28
4973179 Clip actuated latch mechanism for retractable writing instruments Masuo Kubota, Shuhei Kageyama, Yoshihide Mitsuya 1990-11-27
4957384 Mechanical pencil Hidehei Kageyama, Yoshihide Mitsuya 1990-09-18
4955739 Mechanical pencil having side push button actuated lead advance Hidehei Kageyama, Yoshihide Mitsuya 1990-09-11