Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6837292 | Tire building drum provided with a turn-up device | Martin De Graaf, Heinz Gutknecht, Wubbo Pieter De Vries | 2005-01-04 |
| 5948207 | Assembly of devices for building a green tire for vehicles | Wubbo Pieter De Vries, Martin De Graaf, Martinus Regterschot | 1999-09-07 |
| 4842413 | Apparatus for assessing the weld in belt layers for radial pneumatic tires | Johannes Kuijpers, Piet van Berkum | 1989-06-27 |