US PATENT SUBCLASS 74 / 5.45
.~.~.~ By friction

Current as of: June, 1999
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74 /   HD   MACHINE ELEMENT OR MECHANISM

5 R  DF  GYROSCOPES {10}
5.4  DF  .~ Gyroscope control {2}
5.41  DF  .~.~ Erecting {6}
5.45.~.~.~ By friction

DEFINITION

Classification: 74/5.45

(under subclass 5.41) Devices wherein the application of a frictional force is utilized for erection.

(1) Note. Where the force of the surrounding atmosphere against a plurality of vanes is used for erection, the patents will be found in subclass 5.41.