Number | Name | Date | Kind |
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2258284 | Findley | Oct 1941 | A |
2790596 | Stirling | Apr 1957 | A |
3871795 | Habdo et al. | Mar 1975 | A |
4077747 | Burenga | Mar 1978 | A |
5738167 | Asbjornson et al. | Apr 1998 | A |
6190140 | Matson | Feb 2001 | B1 |
Entry |
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Northern Tool, Aug. 1999, Northern Tool, Northern Tool.com-48in. Belt Drive Industrial Fan, 2 pages.* |
Douglas Wright, May 2000, Dept. of Mechanical and Materials Engineering The University of Western Austrailia, 12 pages.* |
Warehouse Equipment and Supply Co., 1998, Warehouse Equip. and Supply Co., 3 pages.* |
Northern Industrial Products, Northern Industrial Products, Fans and Blowers, 9 pages. |