Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4426937 | Heat exchanger furnace | Vernon H. Sietmann, Elmer G. Stockdale | 1984-01-24 |
| 4319557 | Heat exchanger furnace | Vernon H. Sietmann, Elmer G. Stockdale | 1982-03-16 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4426937 | Heat exchanger furnace | Vernon H. Sietmann, Elmer G. Stockdale | 1984-01-24 |
| 4319557 | Heat exchanger furnace | Vernon H. Sietmann, Elmer G. Stockdale | 1982-03-16 |