Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4983813 | Submersible aquarium heater with adjustable electronic thermostatic control | David A. Johnson | 1991-01-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4983813 | Submersible aquarium heater with adjustable electronic thermostatic control | David A. Johnson | 1991-01-08 |