Howard M. Livingston

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Long Grove, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of making valve guide by powder metallurgy process
- Patent number 7,897,102
- Issue date Mar 1, 2011
- Helio Precision Products, Inc.
- Howard M. Livingston
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Heat treated valve guide and method of making
- Patent number 7,628,870
- Issue date Dec 8, 2009
- Helio Precision Products, Inc.
- C. Bruce Blackwell
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of making valve guide having textured external surface
- Patent number 7,198,554
- Issue date Apr 3, 2007
- Helio Precision Products, Inc.
- Howard M. Livingston
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
Heat treated valve guide and method of making
- Publication number 20060174982
- Publication date Aug 10, 2006
- C. Bruce Blackwell
- C21 - METALLURGY OF IRON
Information Patent Application
Method of making valve guide by powder metallurgy process
- Publication number 20060045786
- Publication date Mar 2, 2006
- Howard M. Livingston
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
Method of making valve guide having textured external surface
- Publication number 20050227593
- Publication date Oct 13, 2005
- Howard M. Livingston
- B24 - GRINDING POLISHING