Issued Patents All Time
Showing 25 most recent of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12271214 | Miniature passive thermal control valve for mixing or splitting single-phase fluid with adjustable thermal actuator | Mital Chandrakant MISTRY, Zachary W. Leutwyler, Aaron Richie | 2025-04-08 |
| 11989043 | Miniature passive thermal control valve for mixing or splitting single-phase fluid with adjustable thermal actuator | Mital Chandrakant MISTRY, Zachary W. Leutwyler, Aaron Richie | 2024-05-21 |
| 11261891 | Flow conditioning assembly | Zachary W. Leutwyler | 2022-03-01 |
| 11085470 | Flow conditioning assembly | Zachary W. Leutwyler | 2021-08-10 |
| 8505924 | Rotary shaft sealing assembly | Lannie L. Dietle, John E. Schroeder, Patricio D. Alvarez | 2013-08-13 |
| 7798496 | Rotary shaft sealing assembly | Lannie L. Dietle, John E. Schroeder, Patricio D. Alvarez | 2010-09-21 |
| 7052020 | Hydrodynamic rotary seal | Jeffrey D. Gobeli, Lannie L. Dietle | 2006-05-30 |
| 6767016 | Hydrodynamic rotary seal with opposed tapering seal lips | Jeffrey D. Gobeli, Lannie L. Dietle | 2004-07-27 |
| 6685194 | Hydrodynamic rotary seal with varying slope | Lannie L. Dietle, Jeffrey D. Gobeli | 2004-02-03 |
| 6561520 | Hydrodynamic rotary coupling seal | Lannie Dietle, William T. Conroy, John E. Schroeder | 2003-05-13 |
| 6460635 | Load responsive hydrodynamic bearing | Dezso Somogyi, Lannie L. Dietle | 2002-10-08 |
| 6382634 | Hydrodynamic seal with improved extrusion abrasion and twist resistance | Lannie L. Dietle | 2002-05-07 |
| 6338469 | Flexible wedge gate valve | Patricio D. Alvarez, Jaw-Kuang Wang | 2002-01-15 |
| 6334619 | Hydrodynamic packing assembly | Lannie L. Dietle | 2002-01-01 |
| 6315302 | Skew resisting hydrodynamic seal | William T. Conroy, Lannie L. Dietle, Jeffrey D. Gobeli | 2001-11-13 |
| 6120036 | Extrusion resistant hydrodynamically lubricated rotary shaft seal | Lannie L. Dietle | 2000-09-19 |
| 6036192 | Skew and twist resistant hydrodynamic rotary shaft seal | Lannie L. Dietle | 2000-03-14 |
| 6007105 | Swivel seal assembly | Lannie L. Dietle | 1999-12-28 |
| 5873576 | Skew and twist resistant hydrodynamic rotary shaft seal | Lannie L. Dietle | 1999-02-23 |
| 5862861 | Plug apparatus suitable for sealing holes of variable or roughened diameter | — | 1999-01-26 |
| 5765637 | Multiple test cased hole formation tester with in-line perforation, sampling and hole resealing means | Lannie L. Dietle | 1998-06-16 |
| 5738358 | Extrusion resistant hydrodynamically lubricated multiple modulus rotary shaft seal | Lannie L. Dietle | 1998-04-14 |
| 5678829 | Hydrodynamically lubricated rotary shaft seal with environmental side groove | William T. Conroy | 1997-10-21 |
| 5657961 | Flexible wedge gate valve | Patricio D. Alvarez, Jaw-Kuang Wang | 1997-08-19 |
| 5305839 | Turbine pump ring for drilling heads | Patricio D. Alvarez, Thomas F. Bailey, Larry F. Moeller | 1994-04-26 |