Paul F. Hettwer

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Franksville, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Electrical insulating system
- Patent number 4,450,424
- Issue date May 22, 1984
- McGraw-Edison Company
- Fred S. Sadler
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process for making electrical insulating paper and the product thereof
- Patent number 4,407,697
- Issue date Oct 4, 1983
- McGraw-Edison Company
- Fred S. Sadler
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE