Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7354658 | Oil seal | Tsutomu Watanabe, Mitsuo Kakimoto | 2008-04-08 |
| 7195800 | Metal part, and surface treating method thereof | Tsutomu Watanabe, Mitsuo Kakimoto | 2007-03-27 |
| 7143668 | Customizable light bulb changer | Ronald L. Johnson, Robert Joseph Gallegos, Idriss Mansouri-Chafik | 2006-12-05 |
| 6941841 | Motorized light bulb changer | Ronald L. Johnson | 2005-09-13 |
| 6883400 | Light bulb changer | — | 2005-04-26 |
| 6739220 | Motorized light bulb changer | Ronald L. Johnson | 2004-05-25 |