US PATENT SUBCLASS 148 / 558
.~ With vibration (e.g., mechanical, sound, etc.)

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

95  DF  PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17}
558.~ With vibration (e.g., mechanical, sound, etc.)

DEFINITION

Classification: 148/558

With vibration (e.g., mechanical, sound, etc.):

(under subclass 95) Process which involves the use of mechanical vibration (e.g., high frequency sound, etc.) to modify the microstructure of the metal without deformation of the metal in the vibrating operation.