Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8341986 | Key box construction | Yoshimasa Kataumi | 2013-01-01 |
| 7414539 | Simple alarm device | — | 2008-08-19 |
| 7231791 | Electric cylinder for actuating a door lock and a cylinder door lock | — | 2007-06-19 |
| 6474121 | Lock setting changing unit | Osamu Ishikawa | 2002-11-05 |
| 5212464 | Magnetic card switch | — | 1993-05-18 |
| 5170907 | Personal security case | — | 1992-12-15 |