Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D301915 | Valve | Randall E. Fisher, David L. Martindale | 1989-06-27 |
| D301916 | Valve | Randall E. Fisher, David L. Martindale | 1989-06-27 |
| D299950 | Combined seal-off valve body and cap | Mark A. Canaan | 1989-02-21 |