Issued Patents All Time
Showing 25 most recent of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11680654 | Pilot-operated relief valve assembly | Vishwa Kalyanasundaram, Raul Almazan, William Bockeloh | 2023-06-20 |
| 11408526 | Pilot-operated relief valve assembly | Vishwa Kalyanasundaram, Raul Almazan, William Bockeloh | 2022-08-09 |
| 10001788 | Low pressure pilot operated relief valve | Michael Marcellus, Stephen Simpson | 2018-06-19 |
| 9519294 | Low pressure pilot operated relief valve | Michael Marcellus, Stephen Simpson | 2016-12-13 |
| 9200726 | Vibration damping device | — | 2015-12-01 |
| 9103467 | Vibration damping device for a valve | — | 2015-08-11 |
| 9103466 | Vibration damping device | — | 2015-08-11 |
| 8215330 | Adjustable recirculating valve | Howell A. Smith | 2012-07-10 |
| 6478052 | Pulsation damping assembly and method | Jeff A. Conley | 2002-11-12 |
| 6192924 | Pilot operated relief valve | Thomas F. Higgins | 2001-02-27 |
| 6161570 | Pilot-operated relief valve | — | 2000-12-19 |
| 5769113 | Dual pilot manifold assembly for a safety relief valve | Jack B. Alberts | 1998-06-23 |
| 5590684 | Dual pilot manifold assembly for a safety relief valve | Jack B. Alberts | 1997-01-07 |
| 5333635 | Fluid pressure relief system for pressure vessels | Thomas F. Higgins | 1994-08-02 |
| 5307831 | Safety relief valve for pressure vessels | — | 1994-05-03 |
| 5282491 | Fluid pressure relief system for pressure vessels | Thomas F. Higgins | 1994-02-01 |
| 5249593 | Fluid pressure relief system for pressure vessels | Thomas F. Higgins | 1993-10-05 |
| 5246034 | Fluid pressure relief system for pressure vessels | Thomas F. Higgins | 1993-09-21 |
| 5064169 | Shock absorbing means for flow control devices | Jack B. Alberts | 1991-11-12 |
| 5027852 | Pilot valve for control valves and method of operation | — | 1991-07-02 |
| 5011116 | Shock absorbing sealing means for flow control devices | Jack B. Alberts | 1991-04-30 |
| 4705065 | Safety relief system for control or vent valves | Walter W. Powell | 1987-11-10 |
| 4682495 | Testing device for pilot valves | — | 1987-07-28 |
| 4632143 | Pressure boost attachment for pilot valves | — | 1986-12-30 |
| 4609008 | Non-flowing pressure responsive pilot valve | William Anderson, Irvin B. Weise, deceased, by Stanley A. Weise, executor | 1986-09-02 |