US PATENT SUBCLASS 29 / 521
.~.~.~ Surface interlocking

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}
505  DF  .~.~ Joining by deforming {6}
521.~.~.~ Surface interlocking

DEFINITION

Classification: 29/521

Surface interlocking:

(under subclass 505) Process in which the parts have generally planar faces that carry projections, including deforming the projections to interengage and thereby fasten matching faces of the parts to each other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

524, for a process of securing the peripheral edges of abutting plates by interlocking.