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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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