Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11968003 | Connector providing a connection through a flexible barrier | Peter Hubertus Franciscus Deurenberg, Alfons Wouter Groenland, Albert Hendrik Jan Immink | 2024-04-23 |
| D468976 | Barbecue plate lifter | — | 2003-01-21 |
| D377251 | Barbecue grille scraper head | — | 1997-01-07 |
| 5307963 | Fabricated rotor for rotary valves | — | 1994-05-03 |
| 5115752 | Rod kicker for a sailing vessel rig | — | 1992-05-26 |
| 4550778 | Well screen | Dale W. Sullivan, Kermit W. Janssen | 1985-11-05 |
| 4352512 | Molded fittings | Kermit W. Janssen | 1982-10-05 |
| 4310372 | Method of making a well screen | Kermit W. Janssen | 1982-01-12 |
| 4262744 | Molded fittings and methods of manufacture | Kermit W. Janssen | 1981-04-21 |