US PATENT SUBCLASS 33 / 356
.~.~ Error indicator, preventor, or compensator

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
355 R  DF  .~ Magnetic field responsive {6}
356.~.~ Error indicator, preventor, or compensator {1}
357  DF  .~.~.~> Error-producting-field minimizing {1}

DEFINITION

Classification: 33/356

(under subclass 355) Device including means for indicating the amount of, preventing the effect of, or compensating for the effect of some force other than that of the magnetic field under investigation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

344+, for a direction sensing indicator having means to dampen, or otherwise govern, motion of the sensor.

SEE OR SEARCH CLASS

368, Horology: Time Measuring Systems or Devices,

293, for somewhat similar structures employed on watches and

the like.