Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843830 | Differential ice sensor and method | — | 1989-07-04 |
| 4827397 | Microcomputer-based spark ignition gas burner control system | Jeffrey N. Arensmeier | 1989-05-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843830 | Differential ice sensor and method | — | 1989-07-04 |
| 4827397 | Microcomputer-based spark ignition gas burner control system | Jeffrey N. Arensmeier | 1989-05-02 |