US PATENT SUBCLASS 33 / 321
.~.~ Plural gyroscopes (e.g., reference platform, etc.)

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

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
318  DF  .~ Gyroscopically controlled or stabilized {5}
321.~.~ Plural gyroscopes (e.g., reference platform, etc.) {2}
322  DF  .~.~.~> Diverse indications
323  DF  .~.~.~> Directive gyroscope stabilized by auxiliary gyroscope

DEFINITION

Classification: 33/321

(under subclass 318) Device comprising two or more gyroscopes.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

5.34, for special features of plural gyroscopes, per se.