Harold C. Pierson

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Muskegon, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for removing cores from castings
- Patent number 6,241,000
- Issue date Jun 5, 2001
- Howmet Research Corporation
- Patrick L. Conroy
- B08 - CLEANING
Information Patent Grant
Apparatus for removing cores from castings
- Patent number 5,915,452
- Issue date Jun 29, 1999
- Howmet Research Corporation
- Patrick L. Conroy
- B08 - CLEANING