Donald K. Day

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Marshalltown, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Elastomeric element valve
- Patent number 6,102,071
- Issue date Aug 15, 2000
- Fisher Controls International, Inc.
- Herbert H. Walton
- G05 - CONTROLLING REGULATING
Information Patent Grant
Replaceable flow-control assembly for use in a fluid flow line
- Patent number 5,975,122
- Issue date Nov 2, 1999
- Fisher Controls International, Inc.
- Larry H. Hazen
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS