Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5410808 | Method of making a double wall twist tube | Elmo W. Geppelt, Mark A. Smith | 1995-05-02 |
| 5092038 | Method of manufacturing spiral heat exchanger tubes with an external fin | Elmo W. Geppelt | 1992-03-03 |
| 5002119 | Header and tube for use in a heat exchanger | Elmo W. Geppelt, Richard D. Christensen | 1991-03-26 |
| 4995450 | Heat pipe | Elmo W. Geppelt | 1991-02-26 |
| 4437329 | Method of manufacturing twisted tubes | Elmo W. Geppelt | 1984-03-20 |
| 4317353 | Tube twisting apparatus | Elmo W. Geppelt | 1982-03-02 |