Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4667938 | Rocker arm/spring assembly | — | 1987-05-26 |
| 4667937 | Heat shield for sliding gate valve | — | 1987-05-26 |
| 4603842 | Method of sliding gate valve operation | — | 1986-08-05 |
| 4602729 | Stationary plate and well nozzle for use in a sliding gate valve | — | 1986-07-29 |
| 4582232 | Valve, clamp, refractory and method | George T. Shapland, Gary R. Polk, Randall L. Stalter | 1986-04-15 |
| 4570908 | Furnace valve | — | 1986-02-18 |
| 4545406 | Valve position indicator and method | — | 1985-10-08 |
| 4545512 | Full throttle valve and method of tube and gate change | Earl P. Shapland | 1985-10-08 |
| 4474362 | Valve and method and components thereof | — | 1984-10-02 |
| 4415103 | Full throttle valve and method of tube and gate change | Earl P. Shapland | 1983-11-15 |
| 4381102 | Shroud support and method for shroud engagement with teeming valve | — | 1983-04-26 |
| 4313596 | Shroud support and method for shroud engagement with teeming valve | — | 1982-02-02 |
| 4275825 | Clamp-on tube holder and method | Gary R. Folk | 1981-06-30 |