Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10648137 | Land drainage vacuum lift system and method | — | 2020-05-12 |
| D317372 | Cereal | Richard J. Rothamel, Doreen Stephens | 1991-06-11 |
| 4988235 | System for draining land areas through siphoning from a permeable catch basin | — | 1991-01-29 |
| 4960345 | System for construction of golf course sand bunkers | Roy Anderson, Ken Gorzycki | 1990-10-02 |
| 4919568 | System for draining land areas through siphoning from a permeable catch basin | — | 1990-04-24 |
| 4756643 | Apparatus for placement of lateral drain lines onto a main drainage line for prefabricated composite drainage structures | — | 1988-07-12 |