Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9822494 | Decorative grating and method of manufacturing the same | David W. Bartley, Thomas P. Gerber | 2017-11-21 |
| 8122674 | Grating system forvehicular and pedestrian traffic | Kenneth P. Apperson | 2012-02-28 |
| 7393153 | Grating system | Darryle D. Woodson, Joseph S. Mullane, Thomas J. Snyder, Kenneth P. Apperson | 2008-07-01 |
| 7121759 | Grating system | Darryle D. Woodson, Joseph S. Mullane, Thomas J. Snyder, Kenneth P. Apperson | 2006-10-17 |