Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11933013 | Method of making an integral geogrid from a coextruded multilayered polymer starting material | Manoj Kumar Tyagi | 2024-03-19 |
| RE49523 | Integral polyethylene terephthalate grids, the method of manufacture, and uses thereof | Manoj Kumar Tyagi | 2023-05-09 |
| 11198986 | Method of making an integral geogrid from a coextruded multilayered polymer starting material | Manoj Kumar Tyagi | 2021-12-14 |
| 11067179 | Double positive isolation ball valve | Christian Meade | 2021-07-20 |
| 9249552 | Integral polyethlene terephthalate grids, the method of manufacture, and uses thereof | Manoj Kumar Tyagi | 2016-02-02 |
| 5096335 | Polymer grid for supplemental roof and rib support of combustible underground openings | Ronald P. Anderson, Kenneth W. Miller | 1992-03-17 |
| 4682757 | Secondary backseat for gate valve | — | 1987-07-28 |
| 4658848 | Heat responsive backseat for gate valves | Danny S. Meyer | 1987-04-21 |
| 4601308 | Ball valve with seat loading mechanism | Ralph S. Stone | 1986-07-22 |
| 4585207 | Expanding gate valve with pneumatic actuator | — | 1986-04-29 |
| 4568058 | Dual stage hydraulic actuator for expanding gate valve | — | 1986-02-04 |
| 4408771 | High pressure sealing connection with metal seal | — | 1983-10-11 |
| 4376524 | Low stress stem connection structure for a non-rising stem type gate valve | — | 1983-03-15 |
| 4354523 | Lubricant fitting for a valve | William R. Hochmuth | 1982-10-19 |
| 4320890 | Valve seat structure | Danny S. Meyer | 1982-03-23 |
| 4258743 | Expanding gate valve having mechanically secured seats | Roy R. Dare, Robert C. Houlgrave | 1981-03-31 |