Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5551868 | Preheater block for multi oil furnaces | David J. Yoder, Benuel F. Smoker, Frederick W. Phillips | 1996-09-03 |
| 5531212 | Multi oil furnace | David J. Yoder, Benuel F. Smoker, Frederick W. Phillips, Emanuel S. Beiler | 1996-07-02 |
| 5494025 | Heat exchanger for multi oil furnaces | David J. Yoder | 1996-02-27 |
| 5490495 | Cleanout header for multi oil furnaces | Beneul F. Smoker, David J. Yoder, Frederick W. Phillips, Emanuel S. Beiler | 1996-02-13 |