Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10098448 | Toothbrush timer | — | 2018-10-16 |
| 9739002 | Profiled pile cutter | Herbert Schwane, Michael Klein | 2017-08-22 |
| 8839588 | Bracket for use with boardwalk system | Jason Vincent Philbin, Robert Louis Zimmerman | 2014-09-23 |
| 8522505 | Connector for boardwalk system | Jason Vincent Philbin, Robert Louis Zimmerman | 2013-09-03 |
| 7556451 | Precast concrete bridge and headwall assembly and method of production | Jeffrey J. Von Handorf | 2009-07-07 |
| D514706 | Concrete bridge and headwall unit | — | 2006-02-07 |
| D511387 | Concrete bridge unit with integral footers | — | 2005-11-08 |