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Class Information
Number: 76/24.5
Name: Metal tools and implements, making > File cutting > Process > Chemically sharpening
Description: Method of restoring previously sharpened cutting edges of a file or rasp to sharp condition by application of a chemical that modifies the surface characteristics thereof.


Patents under this class:

Patent Number Title Of Patent Date Issued
4456500 Method of manufacturing a polisher Jun. 26, 1984
4422465 Nail file and method for producing the same Dec. 27, 1983
4075919 Cutting blade of a device for cutting a yarn in a textile machine Feb. 28, 1978
 
 
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