Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5599047 | Magnetic metallic safeguarding thread with negative writing and a method of making same | Wittich Kaule, Michael Boehm, Theodor Burchard | 1997-02-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5599047 | Magnetic metallic safeguarding thread with negative writing and a method of making same | Wittich Kaule, Michael Boehm, Theodor Burchard | 1997-02-04 |