Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868566 | Flexible piezoelectric switch activated metering pulse generators | Lee Karsten, John D. Stolz | 1989-09-19 |
| 4866761 | Automatic meter reading system | Raymond J. Thornborough, Walter L. Probert, Dennis L. Wachs, William L. Kidder | 1989-09-12 |
| 4817131 | Automatic meter reading system | Raymond J. Thornborough, Walter L. Probert, Dennis L. Wachs, William L. Kidder | 1989-03-28 |