Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10471323 | Playing surface assemblies for softball and baseball pitching areas | James E. Carlson, Frederick J. Schmidt | 2019-11-12 |
| 9586121 | Adjustable golf driving surface assembly | James E. Carlson, Frederick J. Schmidt | 2017-03-07 |
| 8944941 | Invertible sports mound | James E. Carlson, Frederick J. Schmidt | 2015-02-03 |