US PATENT SUBCLASS 250 / 356.2
.~.~ Using radioactive tracer

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

336.1  DF  INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING {16}
356.1  DF  .~ Flow metering {1}
356.2.~.~ Using radioactive tracer

DEFINITION

Classification: 250/356.2

Using radioactive tracer:

(under subclass 356.1) Subject matter wherein the material is or includes a radioactive substance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

303, for radioactive tracer methods.