US PATENT SUBCLASS 33 / 330
.~.~.~ Spherical indicator

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}
328  DF  .~.~ Attitude indicator (i.e., pitch or bank) {2}
330.~.~.~ Spherical indicator

DEFINITION

Classification: 33/330

(under subclass 328) Device wherein the gyroscopic indicator is in the form of a sphere or a segment thereof.