Issued Patents All Time
Showing 1–25 of 90 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10578215 | Inline high-recovery flow control valve | — | 2020-03-03 |
| 10376965 | Drilling chuck | Patrick Hengsberger, Peter Schenk | 2019-08-13 |
| 10328496 | Drilling chuck | Peter Schenk, Patrick Hengsberger | 2019-06-25 |
| 10119618 | Cone valve | — | 2018-11-06 |
| 9719601 | Canted, single vane, three-way butterfly valve | — | 2017-08-01 |
| 9403217 | Drill chuck | Peter Schenk, Markus Nusser | 2016-08-02 |
| D735549 | Drill chuck with a conical clamping sleeve | Peter Schenk | 2015-08-04 |
| D735007 | Drill chuck with a conical clamping sleeve | Peter Schenk | 2015-07-28 |
| 9010767 | Collet chuck | — | 2015-04-21 |
| 8979068 | Differential pressure sealing device for ball valves | Arthur R. Yeary, James P. Azzinaro | 2015-03-17 |
| 8869832 | Variable resistance device | — | 2014-10-28 |
| 8540210 | Low friction and gradually opening butterfly valve vane | — | 2013-09-24 |
| D684833 | Four-jaw collet chuck | — | 2013-06-25 |
| D656805 | Four-jaw collet chuck | — | 2012-04-03 |
| D655592 | Four-jaw collet chuck | — | 2012-03-13 |
| 8109519 | Tubular shaft seal | — | 2012-02-07 |
| 7380768 | Balanced-plug cage style control valve and bonnet seal assembly | — | 2008-06-03 |
| 7201188 | Fluted reciprocating ball valve | — | 2007-04-10 |
| 7083160 | Balanced-plug cage style control valve and bonnet seal assembly | — | 2006-08-01 |
| 6994321 | Reciprocating ball valve | — | 2006-02-07 |
| 6973941 | Control valve with low noise and enhanced flow characteristics | — | 2005-12-13 |
| 6935616 | Balanced plug valve | — | 2005-08-30 |
| 6932321 | Balanced-plug cage style control valve and bonnet seal assembly | — | 2005-08-23 |
| 6883554 | Heddle damping system | Franz Mettler | 2005-04-26 |
| 6793197 | Butterfly valve | Charles L. DePenning, Donald G. Ralston | 2004-09-21 |