Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7240788 | Spiral conveyor apparatus with automatic flow control | Duane L. Glass | 2007-07-10 |
| 7086523 | Spiral conveyor apparatus with automatic flow control | Duane L. Glass | 2006-08-08 |
| 6935485 | Spiral conveyor apparatus with automatic flow control | Duane L. Glass | 2005-08-30 |
| 6659268 | Spiral conveyor apparatus with automatic flow control | Duane L. Glass | 2003-12-09 |
| 6398014 | Spiral conveyor apparatus with automatic flow control | Duane L. Glass | 2002-06-04 |
| 6298971 | Spiral conveyor apparatus with automatic flow control | Duane L. Glass | 2001-10-09 |
| 6199677 | Spiral conveyor apparatus with automatic flow control | Duane L. Glass | 2001-03-13 |
| 5901827 | Spiral conveyor apparatus with automatic flow control | Duane L. Glass | 1999-05-11 |