US PATENT SUBCLASS 29 / 525.15
.~.~.~.~ At least one part nonmetallic

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
428  DF  .~ Assembling or joining {21}
525.01  DF  .~.~ By applying separate fastener {5}
525.13  DF  .~.~.~ With supplemental joining {2}
525.15.~.~.~.~ At least one part nonmetallic

DEFINITION

Classification: 29/525.15

At least one part nonmetallic:

(under subclass 525.13) Process wherein at least one part has no metal constituents.