Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11002587 | Ultrasonic level sensor with sound trap | Michael Ehlert, Michael Joseph Rafferty | 2021-05-11 |
| 10408663 | Ultrasonic level sensor with reflectors | Michael Ehlert, Michael Joseph Rafferty | 2019-09-10 |
| 8469422 | Weed extraction system, method | — | 2013-06-25 |
| 7098669 | Depth determining system | — | 2006-08-29 |
| 5400965 | Automated snow-making system | H. Ronald Ratnik | 1995-03-28 |
| 4301501 | Capacitor ratio multiplier | Robert M. Ashby | 1981-11-17 |