Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6828026 | Hollow balls and a method for producing hollow balls and for producing light-weight structural components by means of hollow balls | Frank Bretschneider, Herbert Stephan, Guenter Stephani, Lothar Schneider, Ulf Waag +2 more | 2004-12-07 |