US PATENT SUBCLASS 250 / 473.1
.~ Methods


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250 /   HD   RADIANT ENERGY

472.1  DF  INVISIBLE RADIATION RESPONSIVE NONELECTRIC SIGNALLING {4}
473.1.~ Methods


DEFINITION

Classification: 250/473.1

Methods:

(under subclass 472.1) Subject matter which includes processes for producing a nonelectric signal in response to invisible radiation.