US PATENT SUBCLASS 250 / 576
.~.~.~ Sample holder or supply

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
216  DF  .~ Optical or pre-photocell system {11}
573  DF  .~.~ Fluent material in optical path {4}
576.~.~.~ Sample holder or supply

DEFINITION

Classification: 250/576

(under subclass 573) Subject matter including means to contain, constrain, move or guide fluent material to the optical path.