DP

Dohn W. Pfeiffer

JD John Deere: 30 patents #60 of 5,518Top 2%
CG Case Gmbh: 2 patents #143 of 504Top 30%
CA Cnh America: 1 patents #417 of 777Top 55%
📍 Bettendorf, IA: #6 of 329 inventorsTop 2%
🗺 Iowa: #245 of 15,303 inventorsTop 2%
Overall (All Time): #105,779 of 4,157,543Top 3%
33
Patents All Time

Issued Patents All Time

Showing 26–33 of 33 patents

Patent #TitleCo-InventorsDate
7690973 Combine clean grain elevator system Klaus Becker, Robert W. Hawkins, Dan Burke, Jerry A. Sandau, Bruce A. Coers +1 more 2010-04-06
7371162 Sieve adjustment mechanism for an agricultural combine Robert A. Matousek, Kevin S. Schwinn 2008-05-13
6729637 Side swing hitch for an agricultural combine Joshua J. Wolters, Robert A. Matousek 2004-05-04
6572035 Rotary accelerating apparatus for a crop residue spreader of an agricultural combine 2003-06-03
6241605 Discharge geometry for axially arranged rotary separator Merle Ray Gerber 2001-06-05
6083102 Variable sweep helical infeed element Raymond M. Andes, Jr. 2000-07-04
6036598 Crop processing element for a rotary combine Philip Alan Harden, Klaus Braunhardt 2000-03-14
5688170 Rotary combine having a concentric infeed section and eccentric threshing and separating sections Klaus Braunhardt, David Alden Skinner, Philip Alan Harden 1997-11-18