Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7380522 | Energy saving water heater | James York, Timothy J. Shellenberger | 2008-06-03 |
| 6308009 | Electric water heater with electronic control | Timothy J. Shellenberger | 2001-10-23 |
| 6137955 | Electric water heater with improved heating element | Timothy J. Shellenberger | 2000-10-24 |