US PATENT SUBCLASS 33 / 227
STRAIGHT-LINE LIGHT RAY TYPE

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

227STRAIGHT-LINE LIGHT RAY TYPE {20}
228  DF  .~> Process
229  DF  .~> Aerial bomb sight {2}
232  DF  .~> Marine or aircraft ground speed indicator
233  DF  .~> Gun sight {9}
262  DF  .~> Body related
263  DF  .~> Structurally installed {3}
267  DF  .~> With telemetric means
268  DF  .~> Celestial {1}
272  DF  .~> With magnetic compass {1}
274  DF  .~> With straight edge instrument or chart
275 R  DF  .~> Combined {1}
276  DF  .~> Multisight line {2}
281  DF  .~> Vertical and horizontal angle measurer
282  DF  .~> Vertical angle {2}
285  DF  .~> Horizontal angle measurer
286  DF  .~> Alignment device {3}
290  DF  .~> Level (i.e., surveyor's type) {2}
293  DF  .~> Rod or target {3}
297  DF  .~> Reticle {1}
299  DF  .~> Instrument support

DEFINITION

Classification: 33/227

(under the class definition) Devices or method utilizing nonrefracted light rays and direct sighting for determining the characteristics and the mutual relations of points, lines, angles, surfaces and solids considered as having no properties other than those arising from extension and/or relationship of position or location.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20, for a sight line controlled scriber.

SEE OR SEARCH CLASS

73, Measuring and Testing, appropriate subclasses for a geometric instrument combined with measuring and testing.

356, Optics: Measuring and Testing, appropriate subclasses for an optical geometrical instrument which includes significant optical structure; and see the class definition,

section V for the relationship to Class 33. 362, Illumination, appropriate subclasses for means for throwing a beam of artificial light in a straight line, including devices in which size of the beam may be varied.

378, X-Ray or Gamma Ray Systems or Devices,

163+, for apparatus for measuring a dimension and/or locating the position by measuring means of an object combined with an X-ray device.

396, Photography,

373+, for light deflecting camera viewfinders.