Issued Patents All Time
Showing 26–50 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702193 | Side knock type mechanical pencil | Hidehei Kageyama, Tomiji Ueki | 1997-12-30 |
| 5700101 | Writing tool | Shuhei Kageyama, Toshihiko Kageyama, Youichi Nakazato | 1997-12-23 |
| 5683191 | Writing tool | Shuhei Kageyama, Toshihiko Kageyama, Youichi Nakazato | 1997-11-04 |
| 5662425 | Stick-shaped material propelling container | — | 1997-09-02 |
| 5553956 | Stick-shaped material propelling device | Shoji Anzai | 1996-09-10 |
| 5549404 | Stick-shaped material drive container and supply cassette | Shuhei Kageyama, Shoji Anzai | 1996-08-27 |
| 5480249 | Lead dispensing storage container | Shuhei Kageyama, Shohji Anzai, Tomiji Ueki | 1996-01-02 |
| 5462376 | Mechanical pencil with improved slider mechanism | Hidehei Kageyama, Shouji Anzai | 1995-10-31 |
| 5370471 | Writing tool, with eraser dispenser | Shubei Kageyama, Toshihiko Kageyama, Youichi Nakazato | 1994-12-06 |
| 5306107 | Twin-type stick-shaped material extending container | Shuhei Kageyama, Shoji Anzai | 1994-04-26 |
| 5236270 | Writing tool for advancing lead with eraser dispenser | Shuhei Kageyama, Toshihiko Kageyama, Youichi Nakazato | 1993-08-17 |
| 5207522 | Knock type mechanical pencil with retractable eraser | Shuhei Kageyama, Toshihiko Kageyama, Youichi Nakazato | 1993-05-04 |
| 5193927 | Mechanical pencil having propelling device for a bar shaped article | Shuehi Kageyama, Kazuo Gomi | 1993-03-16 |
| 5165813 | Container with snap-in chuck and chuck ring | Shuhei Kageyama, Tadayoshi Ebinuma, Yoshio Noguchi | 1992-11-24 |
| 5090831 | Writing instrument | Hidehei Kageyama, Youichi Nakazato | 1992-02-25 |
| 5074694 | Latch mechanism for retractable writing instruments | Youichi Nakazato, Masuo Kubota, Shubei Kageyama | 1991-12-24 |
| 5062727 | Writing tool | Shubei Kageyama, Toshihiko Kageyama, Youichi Nakazato | 1991-11-05 |
| 5056947 | Dual refill-type writing utensil | Masuo Kubota, Hidehei Kageyama, Saburo Kobayashi, Tadayoshi Ebinuma | 1991-10-15 |
| 5022774 | Writing tool with eraser dispenser | Shuhei Kageyama, Toshihiko Kageyama, Youichi Nakazato | 1991-06-11 |
| 5018891 | Writing instrument with eraser dispenser | Hidehei Kageyama, Youichi Nakazato | 1991-05-28 |
| 4998837 | Lead cartridge with an openable capping structure | Hidehei Kageyama | 1991-03-12 |
| 4973179 | Clip actuated latch mechanism for retractable writing instruments | Youichi Nakazato, Masuo Kubota, Shuhei Kageyama | 1990-11-27 |
| 4969763 | Lead forwarding mechanism retainer for thurst action mechanical pencil | Shuhei Kageyama, Tadayoshi Ebinuma | 1990-11-13 |
| 4957384 | Mechanical pencil | Hidehei Kageyama, Youichi Nakazato | 1990-09-18 |
| 4955739 | Mechanical pencil having side push button actuated lead advance | Hidehei Kageyama, Youichi Nakazato | 1990-09-11 |