Inventor
FRIEDMANN FRANCIS A
US3 patents
Patents
3 patentsUS5895574AApr 20, 1999
Rolled liquid filter using fluted media
DONALDSON CO INC449 citations98
US5814219ASep 29, 1998
Pleated filter having a planar sheet of randomly arranged filaments to maintain pleat spacing
DONALDSON CO INC127 citations97
US5342519AAug 30, 1994
Fluid filter cartridge with replaceable filter element
DONALDSON CO INC166 citations97