US PATENT SUBCLASS 522 / 910
TREATMENT THROUGH AN EXTERNAL FILTER OR MASK (NONPHOTOGRAGHIC PROCESS)
Current as of:
June, 1999
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522 /
HD
SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES
910
TREATMENT THROUGH AN EXTERNAL FILTER OR MASK (NONPHOTOGRAGHIC PROCESS)
DEFINITION
Classification: 522/910
TREATMENT THROUGH AN EXTERNAL FILTER OR MASK (NONPHOTOGRAPHIC
PROCESS):
Subject matter relating to passing wave energy through a nonimaging mask or filter.
