Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6475658 | Air manager systems for batteries utilizing a diaphragm or bellows | Dennis P. Sieminski, Gary E. G. Gray, John Witzigreuter | 2002-11-05 |
| 6461763 | Battery cartridge | John Witzigreuter | 2002-10-08 |
| 6361294 | Ventilation system for an enclosure | John Witzigreuter, Gary E. G. Gray | 2002-03-26 |