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USPTO Patent Rankings Data through Dec 31, 2025
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Gerald E. Parker — 8 Patents

CECedarapids: 6 patents #7 of 43Top 20%
JIJohnson Crushers International: 2 patents #7 of 18Top 40%
Eugene, OR: #149 of 1,137 inventorsTop 15%
Oregon: #5,193 of 28,073 inventorsTop 20%
Overall (All Time): #600,572 of 4,157,543Top 15%
8 Patents All Time
Gerald E. Parker has been granted 8 US patents while listed as an inventor at Cedarapids. The first was granted in 1998 and the most recent in March 2000. Gerald E. Parker ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list Gerald E. Parker in Eugene, OR, US.

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
6032886 Adjustment for rock crusher Daniel C. Drinkwater, Roger M. Clark, David F. Peaks, Gary Heeszel, Randy Orre 2000-03-07
5971306 Gyratory crusher having tramp iron relief system with an annular hydraulic manifold William A. Ganser, IV, Joseph E. Musil, Donald W. Henry, Mark Lawrence Hunt, David A. Ostergaard +5 more 1999-10-26
5950939 Cone crusher for rock Daniel C. Drinkwater, Roger M. Clark, David F. Peaks 1999-09-14
5944265 Gyratory crusher having self-contained lubrication system William A. Ganser, IV, Joseph E. Musil, Donald W. Henry, Mark Lawrence Hunt, David A. Ostergaard +5 more 1999-08-31
5875981 Gyratory crusher having tramp iron relief system William A. Ganser, IV, Joseph E. Musil, Donald W. Henry, Mark Lawrence Hunt, David A. Ostergaard +5 more 1999-03-02
5810268 Gyratory crusher having easily removable mantel stud William A. Ganser, IV, Peter Alford 1998-09-22
5803382 Gyratory crusher having corrugation-like-seal William A. Ganser, IV, Joseph E. Musil, Donald W. Henry, Mark Lawrence Hunt, David A. Ostergaard +5 more 1998-09-08
5718390 Gyratory crusher William A. Ganser, IV, Joseph E. Musil, Donald W. Henry, John C. Vendelin, Peter Alford +2 more 1998-02-17