US PATENT SUBCLASS 33 / 345
.~.~ Magnetic

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

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
344  DF  .~ With damper or governor for sensor {2}
345.~.~ Magnetic

DEFINITION

Classification: 33/345

(under subclass 344) Device wherein the damping means includes a generator of a magnetic field.