D21D

Watch

Stats

Description

TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE

Subclasses

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Subclass Title
1/00 Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F)
1/02 Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type
1/04 Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beater rolls or bars
1/06 Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Bed plates
1/08 Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with means for driving the pulp quickly

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Patents Issued To Date - By Filing Year

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