Issued Patents All Time
Showing 1–25 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11437772 | Device for managing fencing | — | 2022-09-06 |
| 7661770 | Pneumatic emergency brake assurance module | Robert N. Scharpf, David E. Schweikert | 2010-02-16 |
| 7520574 | Pneumatic emergency brake release timer | David E. Schweikert, Robert N. Scharpf | 2009-04-21 |
| 7374252 | Wheel slip brake assurance module | David E. Schweikert, Robert N. Scharpf | 2008-05-20 |
| 7133796 | Smart resolution valve pressure control | David E. Schweikert | 2006-11-07 |
| 7040715 | Digital multi-point electronic load weigh system | Richard J. Mazur | 2006-05-09 |
| 6901341 | Smart resolution valve pressure control | David E. Schweikert | 2005-05-31 |
| 6820944 | Digital multi-point electronic load weigh system | Richard J. Mazur | 2004-11-23 |
| 6799132 | Smart resolution valve pressure control | David E. Schweikert | 2004-09-28 |
| 6698848 | Time reset safety timer circuit | John H. Corvin, Richard J. Mazur | 2004-03-02 |
| 6663193 | Relay valve based accelerated brake pipe application and release system | John P. Condrasky | 2003-12-16 |
| 6520599 | Four port variable load valve weigh system for a brake pipe controlled brake system | John P. Condrasky | 2003-02-18 |
| 6120109 | Electronic emergency brake load weigh device | Richard J. Mazur | 2000-09-19 |
| 6095621 | Electronic emergency brake load weigh device | Richard J. Mazur | 2000-08-01 |
| 5975656 | Universal wheel slip force control logic | David E. Schweikert | 1999-11-02 |
| 5961564 | Wheel slip control parameter variation process | David E. Schweikert | 1999-10-05 |
| 5887953 | Dual pneumatic trainline control unit | Richard J. Mazur | 1999-03-30 |
| 5791744 | Pneumatic trainline control unit | Richard J. Mazur | 1998-08-11 |
| 5788339 | Universal pneumatic brake control unit | Richard J. Mazur | 1998-08-04 |
| 5752212 | Proportional polarity shift wheel slide protection | David A. Greer | 1998-05-12 |
| 5738417 | Brake pipe sensing unit | Richard J. Mazur | 1998-04-14 |
| 5740043 | Relative spin speed traction control | David E. Schweikert, David A. Greer | 1998-04-14 |
| 5735579 | Brake assurance module | Richard J. Mazur | 1998-04-07 |
| 5654889 | Simplified pattern recognition wheel slide protection | David A. Greer | 1997-08-05 |
| 5650933 | Two state to three state emulator process and apparatus | Richard J. Mazur, John W. Drake | 1997-07-22 |