Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687678 | High efficiency commercial water heater | John Benjamin Hankins | 1997-11-18 |
| 4898124 | Scale agitator | Dirk N. Granberg, Robert W. Ryno | 1990-02-06 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687678 | High efficiency commercial water heater | John Benjamin Hankins | 1997-11-18 |
| 4898124 | Scale agitator | Dirk N. Granberg, Robert W. Ryno | 1990-02-06 |