Peter L. Madonna

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Redmond, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
On-off dump valve
- Patent number 4,665,944
- Issue date May 19, 1987
- Flow Industries, Inc.
- Gerald F. Wallace
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hand held water drilling apparatus
- Patent number 4,437,525
- Issue date Mar 20, 1984
- Flow Industries, Inc.
- Tom A. O'Hanlon
- E21 - EARTH DRILLING MINING