US PATENT SUBCLASS 137 / 552.7
.~ Time

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

551  DF  WITH INDICATOR, REGISTER, RECORDER, ALARM OR INSPECTION MEANS {6}
552.7.~ Time

DEFINITION

Classification: 137/552.7

(under subclass 551) Apparatus calibrated in time.

SEE OR SEARCH CLASS

368, Horology: Time Measuring Systems or Devices, appropriate subclasses for time indicators, per se.