US PATENT SUBCLASS 33 / 232
.~ Marine or aircraft ground speed indicator

Current as of: June, 1999
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227  DF  STRAIGHT-LINE LIGHT RAY TYPE {20}
232.~ Marine or aircraft ground speed indicator

DEFINITION

Classification: 33/232

(under subclass 227) Device for use with an aerial or marine craft for measuring and indicating the velocity of the moving craft with respect to the ground or a fixed object.

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231, for an aircraft ground speed indicator combined with an aerial bomb sight.

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73, Measuring and Testing,

488+, for a device there provided responsive to a speed condition.