Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10315668 | Hopper car gate with multiple openings | — | 2019-06-11 |
| 9725100 | Hatch cover mounted latch for a railcar | — | 2017-08-08 |
| 9358988 | Automatic hopper car gate opening and closing system | — | 2016-06-07 |
| 9073557 | Railcar hatch cover assembly | — | 2015-07-07 |
| 8850991 | Hopper car gate assembly with a door having vertically spaced sections | Brian Early | 2014-10-07 |
| 8371235 | Vacuum and gravity discharge hopper car gate | — | 2013-02-12 |
| 7819067 | Hopper car gate with a curved door | — | 2010-10-26 |
| 7814842 | Hopper car gate with a laterally opening door | — | 2010-10-19 |
| 7806057 | Hopper car gate with opposed double doors | — | 2010-10-05 |
| 7752979 | Hopper car gate with enlarged discharge and increased capacity | — | 2010-07-13 |
| 7367271 | Railway hopper car discharge gate | — | 2008-05-06 |
| 7171907 | Drive system for a railway hopper car discharge gate | — | 2007-02-06 |
| 6412251 | Web core structural panel | — | 2002-07-02 |
| 6374750 | Structural panel system | — | 2002-04-23 |
| 6352036 | Pneumatic actuator for railroad car covers | — | 2002-03-05 |
| 6092471 | Curved rail cover actuator | — | 2000-07-25 |
| 6085664 | Vented hatch cover | — | 2000-07-11 |
| 5979139 | Lightweight, self-supporting paneling | — | 1999-11-09 |
| 5921531 | Retractable handrail for railroad cars | — | 1999-07-13 |
| RE35949 | Railroad car hatch cover system | — | 1998-11-10 |
| 5697121 | Railroad car hatch cover lock | — | 1997-12-16 |
| 5572932 | Railcar hatch cover | — | 1996-11-12 |
| 5517925 | Railroad car hatch cover system | — | 1996-05-21 |
| 5355808 | Battenless railcar hatch cover assembly | — | 1994-10-18 |
| 5016395 | Boxcar door having balsa core sandwich construction | Del E. Walker | 1991-05-21 |