Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7616224 | Process of producing key units wherein marking on their tops made of light-transmitting material can be completed later on | — | 2009-11-10 |
| 7512229 | Key unit, method for marking key top, and method for manufacturing key unit using the same | — | 2009-03-31 |
| 6670562 | Multi stage and multi direction key and multi stage and multi direction key switch using the same | — | 2003-12-30 |