Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6841778 | Method and apparatus for measuring particulates in vehicle emissions | Peter Shifflett, James H. Johnson, Jason K. Webster | 2005-01-11 |
| 5644133 | Remote vehicle emission analyzer with light conveyance to detectors through fiber optic light tubes | John DiDomenico, James H. Johnson | 1997-07-01 |
| 5371367 | Remote sensor device for monitoring motor vehicle exhaust systems | John DiDomenico, James H. Johnson, Kenneth W. Michaels, Donald H. Stedman | 1994-12-06 |