Walter Neitzel

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Patents Grantslast 30 patents

Information Patent Grant
Method of pulping and grading waste paper
- Patent number 3,990,643
- Issue date Nov 9, 1976
- J. M. Voith GmbH
- Walter Neitzel
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Apparatus for pulping and grading of waste paper
- Patent number 3,989,197
- Issue date Nov 2, 1976
- J. M. Voith GmbH
- Walter Neitzel
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE