W. David Dickinson

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Medina, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Reciprocating bladder pump, and methods of constructing and utilizi...
- Patent number 4,749,337
- Issue date Jun 7, 1988
- American Sigma, Inc.
- W. David Dickinson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Two stage pump sampler
- Patent number 4,701,107
- Issue date Oct 20, 1987
- American Sigma, Inc.
- W. David Dickinson
- E21 - EARTH DRILLING MINING