Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7533557 | Impact tensile test machine | Charles M. Roland, Howard L. Schrader | 2009-05-19 |
| 6444473 | Atmospheric ozone concentration detector | Charles M. Roland | 2002-09-03 |
| 5972714 | Atmospheric ozone concentration detector | Charles M. Roland | 1999-10-26 |