Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8033480 | Arrangement for fastening railroad rails to a sleeper | Hans-Ulrich Dietze, Heinz Ossberger, Josef Leitner, John Phillip Porrill, David Seeley | 2011-10-11 |
| 7874527 | Fastening rail in railway slide chair assembly | John Phillip Porrill, David Seeley, Heinz Ossberger, Josef Leitner, Hans-Ulrich Dietze | 2011-01-25 |