US PATENT SUBCLASS 431 / 156
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Current as of: June, 1999
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DEFINITION
Classification: 431/156
(under the class definition) Apparatus which by relative rearrangement of its parts or by the addition or omission of a part is so changed as to become (a) basic subject matter of this class of a different character or having a different mode of operation or (b) basic subject matter of another class.
