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Class Information
Number: 470/59
Name: Threaded, headed fastener, or washer making: process and apparatus > Apparatus for making externally threaded fastener or article, e.g., screw, bolt, etc. > Screw fastener making > Wooden screw
Description: Subject matter wherein the fastener is composed of cellulose extracted from interior part of a tree.

Patents under this class:

Patent Number Title Of Patent Date Issued
5611734 Apparatus for producing wooden threads Mar. 18, 1997
4287627 Method and means for threading dowels Sep. 8, 1981

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