US PATENT SUBCLASS 33 / 366.23
.~.~.~ Having light or radiant energy detecting circuit control element

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


33 /   HD   GEOMETRICAL INSTRUMENTS

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
365  DF  .~ Level or plumb, terrestrial gravitation responsive {9}
366.11  DF  .~.~ Electrically actuated signal or indicator {9}
366.23.~.~.~ Having light or radiant energy detecting circuit control element

DEFINITION

Classification: 33/366.23

Having light or radiant energy detecting circuit control element:

(under subclass 366.11) Subject matter including a circuit control element and wherein the control element is responsive to radiation incident thereon after passage through some portion of the fluent material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

366.16, for this subject matter wherein the control element is, or is located in a fluid.

SEE OR SEARCH CLASS

356, Optics, Measuring and Testing,

139.1, for producing a quantitative indication of angle of inclination from level or vertical by optical photodetection.