Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4555607 | Process for installation and removal of glass pane from a frame | Paul Roentgen, Helmut Krumm, Gottfried Krasborn | 1985-11-26 |
| 4554199 | Inner lamina, and process for manufacture, for vehicle windshield | Paul Roentgen, Helmut Krumm, Heinz Schilde | 1985-11-19 |