De Boef; Duane R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for De Boef; Duane R..The latest application filed is for "grinding drum with a cutter arrangement for a direction of rotation".
- De Boef; Duane R. - Sherrard IL
- De Boef; Duane R. - New Sharon IA
| Patent | Date |
|---|---|
| Grinding drum with a cutter arrangement for a direction of rotation Grant 7,959,097 - De Boef June 14, 2 | 2011-06-14 |
| Grinding Drum With A Cutter Arrangement For A Direction Of Rotation App 20080277509 - De Boef; Duane R. | 2008-11-13 |
| Rotary grinder apparatus and method Grant 7,213,779 - Roozeboom , et al. May 8, 2 | 2007-05-08 |
| Rotary grinder apparatus and method App 20050035234 - Roozeboom, Keith ; et al. | 2005-02-17 |
| Rotary grinder apparatus and method Grant 6,840,471 - Roozeboom , et al. January 11, 2 | 2005-01-11 |
| Rotary grinder apparatus and method App 20020190148 - Roozeboom, Keith ; et al. | 2002-12-19 |
| Rotary grinder apparatus and method Grant 6,422,495 - De Boef , et al. July 23, 2 | 2002-07-23 |
| Swinging hammer for a material reducing machine Grant 5,507,441 - De Boef , et al. April 16, 1 | 1996-04-16 |
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