Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9701382 | Sail assembly using slugs and flakers | — | 2017-07-11 |
| 9457821 | Railroad signaling and communication system using a fail-safe voltage sensor to verify trackside conditions in safety-critical railroad applications | Francois P. Pretorius, David L. Hill, Charles A. Wisniewski | 2016-10-04 |
| 9352815 | Sail assembly using slugs and flakers | — | 2016-05-31 |
| 8989926 | Railroad signaling and communication system using a fail-safe voltage sensor to verify trackside conditions in safety-critical railroad applications | Francois P. Pretorius, David L. Hill, Charles A. Wisniewski | 2015-03-24 |