Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4964395 | Apparatus and method for a solar radiation water heater | Harold L. Drury | 1990-10-23 |
| D310060 | Solar water heater or the like | Harold L. Drury | 1990-08-21 |
| 4782816 | Apparatus for a solar water heater | Harold L. Drury | 1988-11-08 |