Inventor · disambiguated record
John Hiemstra
Also filed as: HIEMSTRA JOHN · HIEMSTRA JOHN R
8 granted patents·1 pending application·181 citations·filing 1974–2014
88Inventor score
Top patents by PatentIndex Score
9 records- 0194US3944265AExhaust system connector sealDONALDSON CO INC·Filed 1974·Granted Mar 16, 1976·57 cites·16 claims
- 0283US6354398B1Mufflers for use with engine retarders; and methodsDONALDSON CO INC·Filed 2000·Granted Mar 12, 2002·33 cites·10 claims
- 0375US4969537AMuffler assembly and method of manufactureDONALDSON CO INC·Filed 1988·Granted Nov 13, 1990·42 cites·6 claims
- 0469US6082487AMufflers for use with engine retarders; and methodsDONALDSON CO INC·Filed 1999·Granted Jul 4, 2000·34 cites·36 claims
- 0564US8776502B2System and method for regenerating an auxiliary power unit exhaust filterHIEMSTRA JOHN·Filed 2009·Granted Jul 15, 2014·6 cites·20 claims
- 0652US8061129B2System and method to regenerate a diesel particulate filterIRLBECK JILL N·Filed 2009·Granted Nov 22, 2011·2 cites·25 claims
- 0751US9273585B2System and method for regenerating an auxiliary power unit exhaust filterDONALDSON CO INC·Filed 2014·Granted Mar 1, 2016·0 cites·8 claims
- 0848US7294162B2Exhaust filterDONALDSON CO INC·Filed 2004·Granted Nov 13, 2007·7 cites·22 claims
- 0943US2008245039A1Exhaust FilterDONALDSON CO INC·Filed 2007·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →