Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6613138 | Manufactured granular substrate and method for producing the same | James Welshimer, Timothy D. Birthisel | 2003-09-02 |
| 6231660 | Manufactured granular substrate and method for producing the same | James Welshimer, David L. Ashworth, Peter V. Cawlfield, Gerald L. Gingrich, Karissa L. Fox +3 more | 2001-05-15 |