US PATENT SUBCLASS 33 / 280
.~.~.~ Each separately adjustable

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

227  DF  STRAIGHT-LINE LIGHT RAY TYPE {20}
276  DF  .~ Multisight line {2}
278  DF  .~.~ Relatively movable {2}
280.~.~.~ Each separately adjustable

DEFINITION

Classification: 33/280

(under subclass 278) Device wherein each sight directing means may be moved or adjusted independently of another.