US PATENT SUBCLASS 340 / 680
.~.~.~ Machine tool

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
679  DF  .~.~ Machine condition {6}
680.~.~.~ Machine tool

DEFINITION

Classification: 340/680

Machine tool:

(under subclass 679) Subject matter where the machine component monitored is a tool (e.g., drill bit or cutting tool).

SEE OR SEARCH CLASS

173, Tool Driving or Impacting,

20+, for a tool driving device with indicating or signalling means.