US PATENT SUBCLASS 33 / 293
.~ Rod or target

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

227  DF  STRAIGHT-LINE LIGHT RAY TYPE {20}
293.~ Rod or target {3}
294  DF  .~.~> Self computing type rod
295  DF  .~.~> With leveling or plumbing adjunct
296  DF  .~.~> Extensible rod sections

DEFINITION

Classification: 33/293

(under subclass 227) Device comprising (1) a graduated rod useable in conjunction with a surveyor's instrument located at a point remote from the rod for measuring the vertical distance between a point on the ground and the line of sight of the instrument or (2) other devices; e.g., target, usable in conjunction with the instrument to distinguish the terminal end of the line of sight.