US PATENT SUBCLASS 74 / 438
.~.~ External and internal teeth

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


74 /   HD   MACHINE ELEMENT OR MECHANISM

640  DF  GEARING {31}
434  DF  .~ Rotary bodies {5}
438.~.~ External and internal teeth

DEFINITION

Classification: 74/438

(under subclass 434) Devices, provided with teeth both on the inner and outer periphery.