Dale T. Lehman

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Solon, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Molten metal pump impeller
- Patent number 6,837,678
- Issue date Jan 4, 2005
- Dale T. Lehman
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Molten metal pump impeller
- Patent number 6,755,614
- Issue date Jun 29, 2004
- Dale T. Lehman
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Post mounting system and method for molten metal pump
- Patent number 6,562,286
- Issue date May 13, 2003
- Dale T. Lehman
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Molten metal pump impeller
- Patent number 6,468,039
- Issue date Oct 22, 2002
- Dale T. Lehman
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Molten metal pump
- Patent number 6,457,940
- Issue date Oct 1, 2002
- Dale T. Lehman
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Heat exchanger
- Patent number 4,244,423
- Issue date Jan 13, 1981
- Bruno H. Thut
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Heat exchanger
- Patent number 4,119,141
- Issue date Oct 10, 1978
- Bruno H. Thut
- F28 - HEAT EXCHANGE IN GENERAL