US PATENT SUBCLASS 451 / 79
.~.~ File


Current as of: June, 1999
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451 /   HD   ABRADING

64  DF  MACHINE {12}
75  DF  .~ Sandblast {13}
79.~.~ File


DEFINITION

Classification: 451/79

File:

(under subclass 75) Abrading machine specifically designed to perform an abrading operation on a material working file.

(1) Note. Included in this subclass is a patent for cleaning and/or resharpening a file.

SEE OR SEARCH CLASS

76, Metal Tools and Implements, Making,

12+, for file cutting in general.