Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5136869 | High security key and cylinder lock assembly | — | 1992-08-11 |
| D327835 | Front face of a key plug | Timothy R. Bjornson, James W. Borgmann, Gary R. Jacobs | 1992-07-14 |
| D325161 | Portion of a key blade blank | Timothy R. Bjornson, James W. Borgmann, Gary R. Jacobs | 1992-04-07 |
| 4831166 | Preparation of alpha-substituted upsilon-butyrolactones | Heinz Eckhardt, Walter Gramlich, Klaus Halbritter | 1989-05-16 |
| 4804758 | Preparation of 1,4-diazabicyclo[2.2.2]octanes | Wolfgang Hoelderich, Kurt Schneider | 1989-02-14 |