Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889162 | Fluid control valve | Haydn J. Newcombe | 1989-12-26 |
| 4889165 | Water supply valves | Haydn J. Newcombe | 1989-12-26 |
| 4890317 | Automatic validation of telephone account numbers | Lindsey D. Owen, Michael R. Rice | 1989-12-26 |