US PATENT SUBCLASS 351 / 230
.~.~.~ With individual lens holder

Current as of: June, 1999
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351 /   HD   OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING

200  DF  EYE EXAMINING OR TESTING INSTRUMENT {7}
222  DF  .~ Subjective type {7}
227  DF  .~.~ Including trial frame {4}
230.~.~.~ With individual lens holder

DEFINITION

Classification: 351/230

With individual lens holder:

(under subclass 227) Subject matter including individual lens holders for single test lenses which may be temporarily and interchangeably inserted into trial or conventional eyeglass frames.

(1) Note. The above lens holders carry usually projecting handles or calibrated dials which bear date indentifying each lens as by sphere, diopter and axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

154, for lens rims generally.