Lee E. Walko

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Midland, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Vent collar for plastic lined pipe
- Patent number 5,149,142
- Issue date Sep 22, 1992
- The Dow Chemical Company
- Lee E. Walko
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...