Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D753067 | Electrical contactor | Cathleen M. Clausen, Nicholas Graham Hartman, David A. Donovan | 2016-04-05 |
| D713359 | Electrical contactor | Cathleen M. Clausen, Nicholas Graham Hartman, David A. Donovan | 2014-09-16 |