Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6470570 | Method for making a tube for a heat exchanger having a fin insert with transverse convolutions | Richard P. Stoynoff | 2002-10-29 |
| 6286201 | Apparatus for fin replacement in a heat exchanger tube | Richard P. Stoynoff | 2001-09-11 |
| 5732584 | Method and apparatus for roll forming convoluted springs | Richard P. Stoynoff | 1998-03-31 |
| 4398456 | Machine for converting returnable cans into metal ingots | — | 1983-08-16 |