Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8353328 | Sand-forming apparatus | Steven J. Sigl | 2013-01-15 |
| 7441583 | Sand-forming apparatus | Steven J. Sigl | 2008-10-28 |
| 7284588 | Sand-forming apparatus | Steven J. Sigl | 2007-10-23 |
| 7137432 | Sand-forming apparatus | Steven J. Sigl | 2006-11-21 |
| 6866083 | Sand-forming apparatus | Steven J. Sigl | 2005-03-15 |
| 5072775 | Core blowing machine | Roger W. Hale | 1991-12-17 |
| 4942916 | Core blowing machine | Roger W. Hale | 1990-07-24 |