US PATENT SUBCLASS 29 / 1.31
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Current as of: June, 1999
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29 /   HD   METAL WORKING

1.3  DF  CARTRIDGE CASING MAKING {2}
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DEFINITION

Classification: 29/1.31

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(under subclass 1.3) Process or apparatus for flattening, flanging, and indenting the closed end of a metal tube to adapt it for use as a rim or center fire cartridge.