Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11018394 | Top loading battery holder | Charles Engelstein | 2021-05-25 |
| 10333116 | Top loading battery holder | Charles Engelstein | 2019-06-25 |
| 9192059 | Battery holder for printed circuit board | Charles Engelstein | 2015-11-17 |