Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12287516 | Dustcap with built-in cleaner | John P. Hill, William J. Cruzen, James John Henschel | 2025-04-29 |
| 12007609 | Dustcap with built-in cleaner | John P. Hill, William J. Cruzen, James John Henschel | 2024-06-11 |
| 11681108 | Dustcap with built-in cleaner | John P. Hill, William J. Cruzen, James John Henschel | 2023-06-20 |
| 11675139 | Dust cap with built-in cleaner | John P. Hill, William J. Cruzen, James John Henschel | 2023-06-13 |
| 11422314 | Dustcap with built-in cleaner | John P. Hill, William J. Cruzen, James John Henschel | 2022-08-23 |