Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5042081 | Electrical thermal storage heating unit with easily replaced heating | Paul J. Steffes, Thomas P. Steffes | 1991-08-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5042081 | Electrical thermal storage heating unit with easily replaced heating | Paul J. Steffes, Thomas P. Steffes | 1991-08-20 |