Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5724829 | Chiller heating assembly | Frank Schubach | 1998-03-10 |
| 5240405 | Waste oil heater system | Frank Schubach | 1993-08-31 |
| 4877395 | System control means to preheat waste oil for combustion | Frank Schubach | 1989-10-31 |
| 4797089 | System control means to preheat waste oil for combustion | Frank Schubach | 1989-01-10 |