US PATENT SUBCLASS 384 / 492
.~.~.~.~ Ball or race composition or material

Current as of: June, 1999
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384 /   HD   BEARINGS

91  DF  ROTARY BEARING {8}
445  DF  .~ Antifriction bearing {9}
456  DF  .~.~ Radial bearing {9}
490  DF  .~.~.~ Ball bearing {17}
492.~.~.~.~ Ball or race composition or material

DEFINITION

Classification: 384/492

Ball or race composition or material:

(under subclass 490) Subject matter wherein the composition, e.g., density or porosity; or material of a ball or race is specified.

SEE OR SEARCH THIS CLASS, SUBCLASS:

907, Crosss-Reference Art Collection for bearing material not provided in the regular schedule.