Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6158152 | Pneumatic excavator | Richard D. Nathenson, Jerome Apt, Jr., Martin Uram | 2000-12-12 |
| 5966847 | Pneumatic excavator | Richard D. Nathenson, Jerome Apt, Jr., Martin Uram | 1999-10-19 |
| D408830 | Pneumatic nozzle | Richard D. Nathenson | 1999-04-27 |
| 5860232 | Mobile safe excavation system having a deflector plate and vacuum source | Richard D. Nathenson, Jerome Apt, Jr. | 1999-01-19 |
| 5487229 | Apparatus for pneumatic excavation | Richard D. Nathenson, Jerome Apt, Jr., Martin Uram, Gary H. Brawley, Donald J. Hackman +1 more | 1996-01-30 |