Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9419501 | Constant force shaft grounding brush holder | John Bank, Doug Bank | 2016-08-16 |
| 7402933 | Constant force modular integrated internal brush holder | John Bank, Douglas Bank, Kurt Witbeck | 2008-07-22 |
| 6731042 | Constant force cartridge brush holder | John Bank, Doug Bank | 2004-05-04 |