Inventor · disambiguated record
Hartmut Kriehn
Also filed as: KRIEHN HARTMUT
13 granted patents·1 pending application·156 citations·filing 1988–2003
92Inventor score
Top patents by PatentIndex Score
14 records- 0179US6758660B2Screw vacuum pump with a coolant circuitLEYBOLD VAKUUM GMBH·Filed 2000·Granted Jul 6, 2004·19 cites·23 claims
- 0269US5718565AApparatus and process for operating a dry-compression vacuum pumpLEYBOLD AG·Filed 1993·Granted Feb 17, 1998·24 cites·2 claims
- 0369US4940398ATwin-shaft, multiple-stage vacuum pump with the shafts vertically disposedLEYBOLD AG·Filed 1988·Granted Jul 10, 1990·24 cites·19 claims
- 0463US7056108B2Cooled screw-type vacuum pumpLEYBOLD VAKUUM GMBH·Filed 2002·Granted Jun 6, 2006·9 cites·11 claims
- 0562US5364245ADry-running twin-shaft vacuum pumpLEYBOLD AG·Filed 1992·Granted Nov 15, 1994·20 cites·8 claims
- 0659US5131825AMulti-stage vacuum pump with reaction chamber between stagesLEYBOLD AG·Filed 1991·Granted Jul 21, 1992·18 cites·11 claims
- 0756US6964559B2Two shaft vacuum pump with cantilevered rotorsLEYBOLD VAKUUM GMBH·Filed 2001·Granted Nov 15, 2005·7 cites·23 claims
- 0855US7153093B2Vacuum pumpLEYBOLD VAKUUM GMBH·Filed 2003·Granted Dec 26, 2006·6 cites·19 claims
- 0953US7232295B2Tempering method for a screw-type vacuum pumpOERLIKON LEYBOLD VACUUM GMBH·Filed 2002·Granted Jun 19, 2007·6 cites·25 claims
- 1047US6863511B2Two-shaft vacuum pumpLEYBOLD VAKUUM GMBH·Filed 2001·Granted Mar 8, 2005·3 cites·18 claims
- 1141US5660535AMethod of operating a claw-type vacuum pump and a claw-type vacuum pump suitable for carrying out the methodLEYBOLD AG·Filed 1996·Granted Aug 26, 1997·9 cites·14 claims
- 1236US5975857AProcess for operating a dry-compression vacuum pump as well as a suitable vacuum pump for implementation of this processLEYBOLD AG·Filed 1997·Granted Nov 2, 1999·6 cites·12 claims
- 1336US5399817AMufflerLEYBOLD AG·Filed 1991·Granted Mar 21, 1995·5 cites·8 claims
- 1435US2005069446A1Cooled screw vacuum pumpFiled 2000·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →