Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7849801 | Protective housing assembly for a tank car manway | Thomas H. Dalrymple | 2010-12-14 |
| 6910427 | Security device and method to prevent unauthorized discharge of contents from a tank | Thomas H. Dalrymple | 2005-06-28 |
| 6694889 | Siphon drainpipe system and method for a railway tank car | Stephen W. Smith | 2004-02-24 |