Derrick Ronald Woodward

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Pointe Claire, CA

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Patents Grantslast 30 patents

Information Patent Grant
Automatic vacuum bleed valve for use on paper making machines
- Patent number 4,413,644
- Issue date Nov 8, 1983
- JWI Ltd.
- Derrick R. Woodward
- G05 - CONTROLLING REGULATING
Information Patent Grant
Automatic vacuum stabilizing valve
- Patent number 4,070,237
- Issue date Jan 24, 1978
- JWI Ltd.
- Derrick Ronald Woodward
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE