RP

Richard D. Primdahl

CU Cummins-Allison: 2 patents #75 of 120Top 65%
DI Dresser Industries: 1 patents #301 of 787Top 40%
EV Everpure: 1 patents #7 of 21Top 35%
UF United States Filter: 1 patents #57 of 137Top 45%
📍 Gurnee, IL: #162 of 652 inventorsTop 25%
🗺 Illinois: #15,122 of 84,256 inventorsTop 20%
Overall (All Time): #886,219 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
5888381 Water filter with pressure actuated flow monitor Dale A. Squier, John E. Zabinski 1999-03-30
5833849 Spout mounted water filter and extension 1998-11-10
RE34934 Coin sorter with counter and brake mechanism Donald E. Raterman, Richard A. Mazur 1995-05-09
5055086 Coin sorter with counter and brake mechanism Donald E. Raterman, Richard A. Mazur 1991-10-08
4921463 Coin sorter with counter and brake mechanism Donald E. Raterman 1990-05-01
4526204 Control apparatus for hydraulic valve 1985-07-02