A patentable invention must be new, non-obvious, & this, like the "arts" the constitution encourages
[DOC] [TLE] Patents, Copyrights and Trademarks | Resources for Inventors ... [PAR] Patents are limited by territory (a U.S. patent only protects your invention in the ... 
Patent law came about because the government wanted to encourage ... Design 
Patent  ornamental design, appearance; Plant Patent  new and distinct 
variety of plant ... To be an inventor, one must make a novel, useful and non-
obvious... [DOC] [TLE] The Origins of Patent and Copyright Law - Constitutional Rights ... [PAR] The law gave Brunelleschi the exclusive right to operate his new method of water 
...