Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5551868 | Preheater block for multi oil furnaces | Benjamin K. Smoker, Benuel F. Smoker, Frederick W. Phillips | 1996-09-03 |
| 5531212 | Multi oil furnace | Benjamin K. Smoker, Benuel F. Smoker, Frederick W. Phillips, Emanuel S. Beiler | 1996-07-02 |
| 5494025 | Heat exchanger for multi oil furnaces | Benjamin K. Smoker | 1996-02-27 |
| 5490495 | Cleanout header for multi oil furnaces | Beneul F. Smoker, Benjamin K. Smoker, Frederick W. Phillips, Emanuel S. Beiler | 1996-02-13 |
| 5408941 | Multi oil furnace service doors | Emanuel S. Beiler, Benuel F. Smoker | 1995-04-25 |
| 5409373 | Burner housing for multi oil furnaces | Frederick W. Phillips | 1995-04-25 |