US PATENT SUBCLASS 33 / 328
.~.~ Attitude indicator (i.e., pitch or bank)

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.~.~ Attitude indicator (i.e., pitch or bank) {2}
329  DF  .~.~.~> Gyroscope mounted, lever indicator and skyplate
330  DF  .~.~.~> Spherical indicator

DEFINITION

Classification: 33/328

(under subclass 318) Device wherein the gyroscopic means is used to indicate, with respect to a horizontal plane, the extent of right or left tilt of a craft or upward or downward tilt of a craft on which the gyroscope is mounted.

SEE OR SEARCH CLASS

73, Measuring and Testing,

488+, for attitude indicators combined with speed responsive devices.