FW

Fred H. Wahlquist

DC Donaldson Company: 35 patents #27 of 695Top 4%
📍 Bloomington, MN: #28 of 1,157 inventorsTop 3%
🗺 Minnesota: #1,581 of 52,454 inventorsTop 4%
Overall (All Time): #95,987 of 4,157,543Top 3%
35
Patents All Time

Issued Patents All Time

Showing 26–35 of 35 patents

Patent #TitleCo-InventorsDate
5902364 Conical filter Joseph C. Tokar, Gary R. Gillingham, Wayne M. Wagner, Daniel T. Risch, Jim C. Rothman +2 more 1999-05-11
5895574 Rolled liquid filter using fluted media Francis A. Friedmann, Gary R. Gillingham, Bernard A. Matthys, Daniel T. Risch, Wayne M. Wagner 1999-04-20
5820646 Inline filter apparatus Gary R. Gillingham, Wayne M. Wagner, Joseph C. Tokar, Daniel T. Risch, Jim C. Rothman 1998-10-13
5772883 Slanted inline filter Jim C. Rothman, Gary R. Gillingham, Wayne M. Wagner, Joseph C. Tokar, Daniel T. Risch +1 more 1998-06-30
5683479 Air cleaner having scavenger arrangement Gary R. Gillingham, Peter A. Betts, Daniel T. Risch, James C. Rothman 1997-11-04
5575826 Air cleaner Gary R. Gillingham, Peter A. Betts, Daniel T. Risch, James C. Rothman 1996-11-19
5401285 Air cleaner having scavenger arrangement for precleaner and filter thereof Gary R. Gillingham, Peter A. Betts, Daniel T. Risch, James C. Rothman 1995-03-28
5116083 Clamp for coupling and sealing pipe joints Gary R. Gillingham, Wayne M. Wagner 1992-05-26
4504293 Self-cleaning air filter Gary R. Gillingham, Bernard A. Matthys 1985-03-12
4452616 Self-cleaning air cleaner Gary R. Gillingham 1984-06-05