Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4804944 | Hall effect liquid level sensing apparatus and method | Joseph Marcus Elder | 1989-02-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4804944 | Hall effect liquid level sensing apparatus and method | Joseph Marcus Elder | 1989-02-14 |