Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE34345 | Fiber optic imaging system for on-line monitoring | Bernard J. Dolan, Ralph Grabowski, Phillip Carvey, Tamas Hetenyi, Randal B. Chinnock +1 more | 1993-08-17 |
| 5073027 | Fiber optic displacement measuring apparatus | David A. Krohn | 1991-12-17 |
| 4772128 | Fiber optic imaging system for on-line monitoring | Bernard J. Dolan, Ralph Grabowski, Phillip Carvey, Tamas Hetenyi, Randal B. Chinnock +1 more | 1988-09-20 |
| 4698616 | Optoelectronic rotational position sensor | David A. Krohn, David Ralph Maack, John Ellison | 1987-10-06 |
| 4679029 | Optoelectronic rotational position sensor | David A. Krohn, David Ralph Maack, John Ellison | 1987-07-07 |
| 4500870 | Method and components for remote reading of utility meters | David A. Krohn, Louis A. Buffone | 1985-02-19 |
| 4356432 | Solid state power switch for gas discharge lamps | — | 1982-10-26 |