Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8161088 | Pocket calculator for financial, mathematical calculation routines | — | 2012-04-17 |
| D558256 | Calculator | Dirk K. Runzheimer | 2007-12-25 |
| D553670 | Calculator | Dirk K. Runzheimer | 2007-10-23 |
| D544029 | Calculator | Dirk K. Runzheimer | 2007-06-05 |