Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6708489 | Pneumatic actuator | Roger G. Massey | 2004-03-23 |
| 5819775 | Low flow rate valve | — | 1998-10-13 |
| 5772177 | Valve latching device for single handed operation | Kenneth Madden, Roger G. Massey | 1998-06-30 |
| 5647389 | Indexable latching handle assembly for quarter-turn rotary valves | — | 1997-07-15 |
| 5460351 | Valve stem locking assembly | — | 1995-10-24 |
| 4909275 | Latching handle | Roger G. Massey, Kenneth Walton | 1990-03-20 |
| 4727899 | Pilot valve assembly | Roger G. Massey | 1988-03-01 |
| 4559966 | Valve handle with selectable stops | Roger G. Massey | 1985-12-24 |
| 4326627 | Limit switch for rotary control device | Roger G. Massey | 1982-04-27 |