Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6810305 | Obstruction management system for robots | — | 2004-10-26 |
| 6481515 | Autonomous mobile surface treating apparatus | Harry B. Maddox, Kevin B. Clendenien, Andrew Weatherston, Charles Fisher, Gary Gordon Heaton +2 more | 2002-11-19 |
| 6459955 | Home cleaning robot | Eric Richard Bartsch, Charles Fisher, Paul Amaat France, Gary Gordon Heaton, Thomas Charles Hortel +2 more | 2002-10-01 |
| 5674401 | Oil monitor with magnetic field | Arby D. Dickert, Eric Johnson, Keith A. Hawn | 1997-10-07 |
| 5614830 | Oil monitor with magnetic field | Arby D. Dickert, Eric Johnson, Keith A. Hawn | 1997-03-25 |
| 5262732 | Oil monitor with magnetic field | Arby D. Dickert, Eric Johnson, Keith A. Hawn | 1993-11-16 |
| 5194910 | Use of optical spectrometry to evaluate the condition of used motor oil | James R. Stevenson | 1993-03-16 |