US PATENT SUBCLASS 33 / 278
.~.~ Relatively movable

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.~.~ Relatively movable {2}
279  DF  .~.~.~> Angularly and rectilinearly
280  DF  .~.~.~> Each separately adjustable

DEFINITION

Classification: 33/278

(under subclass 276) Device wherein at least one of the sight directing means may be moved or adjusted with respect to another.