US PATENT SUBCLASS 29 / 90.7
.~ By shot peening or blasting

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

90.01  DF  BURNISHING {4}
90.7.~ By shot peening or blasting

DEFINITION

Classification: 29/90.7

By shot peening or blasting:

(under subclass 90.01) Process or apparatus wherein the condensing, compacting, smoothing, or polishing is effected by either hammering or bombarding the surface with hard shot.