Assertion: patent's inventor | /r/CapableOf | identify useful purpose
Facets:
value: for it
type: PURPOSE
Source sentences:
text: The invention must be "useful" in a practical sense (the inventor must identify some useful purpose for it), "novel" (i.e., not known or used before the filing), and "nonobvious" (i.e., not an improvement easily made by someone trained in the relevant area).