Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6049144 | Rechargeable battery with a built-in safety circuit for a portable electric apparatus | Bjorn Frannhagen | 2000-04-11 |
| 6043626 | Auxiliary battery holder with multicharger functionality | Thomas D. Snyder | 2000-03-28 |
| 6031353 | Method and apparatus for communicating battery pack information | Ivan Nelson Wakefield | 2000-02-29 |
| 5859481 | Auxiliary battery sensor switch | — | 1999-01-12 |
| 5818204 | Battery charging methods and apparatuses | Bjorn Frannhagen | 1998-10-06 |
| 5814969 | Apparatus for selectively activating a plurality of devices | — | 1998-09-29 |