US PATENT SUBCLASS 33 / 309
.~.~.~ Radiant energy or electrically produced marking

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

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
304  DF  .~ Borehole direction or inclination {6}
308  DF  .~.~ Pendulum mounted or directed marker {3}
309.~.~.~ Radiant energy or electrically produced marking

DEFINITION

Classification: 33/309

(under subclass 308) Device wherein the marking means includes (1) wave energy transmitted through a natural media and guided through the pendulum to the record surface or (2) an electrically conducting point on the pendulum which produces a marking spark between the pendulum and record surface or marks the record surface by electrolysis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

314, for other radiant energy produced marking.