Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852203 | Paint edger for the application of paint | — | 1989-08-01 |
| 4730550 | Piston cup and cylinder assembly | David A. Bramstedt, Thomas R. Hetzel | 1988-03-15 |
| 4545405 | Multi-position relief valve | — | 1985-10-08 |
| 4275999 | Air compressor with ramped intake valve | Thomas R. Hetzel | 1981-06-30 |