Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5412332 | Drive circuit for a flyback converter with switching transistors in bridge arrangement | Schelte Heeringa | 1995-05-02 |
| 5144218 | Device for determining the charge condition of a battery | — | 1992-09-01 |
| 5111580 | Electric shaving apparatus | Andries Cornelis Pasma | 1992-05-12 |
| 4849681 | Battery-powered device | Robert-Han Munnig Schmidt | 1989-07-18 |
| 4835453 | Battery-powered device | Robert-Han Munning Schmidt | 1989-05-30 |