Uru dị ịtụnanya

N'ime iwu patent nke United States, ịba uru dị egwu bụ echiche nke, ka ihe mepụtara wee bụrụ ikike ikike, ọ ga-enwerịrị ọrụ bara uru kwesịrị ntụkwasị obi.  Ọ bụrụ na ọ nweghị ọrụ bara uru a pụrụ ịdabere na ya n'agbanyeghị nkwupụta nke onye na-emepụta ihe, mgbe ahụ enwere ike ịjụ ngwa maka patent dị ka inwe "ọrụ dị egwu".  Ihe nchoputa ahụ ekwesịghị ịrụ ọrụ dịka onye na-emepụta ihe si eche na ọ na-arụ ọrụ, ma ọ ghaghị ime ihe bara uru.  Ikike ikike ejidere na adịghị mma maka ịba uru dị egwu gụnyere:

 ihe e mepụtara iji gbanwee ụtọ nri site na iji magnetik (Fregeau v. Mossinghoff, 776 F.2d 1034, 227 USPQ 848 (Fed. Cir. 1985)),
 a perpetual motion machine (Newman v. Quigg, 877 F.2d 1575, 11 USPQ2d 1340 (Fed. Cir. 1989)),
 igwe na-efe efe na-arụ ọrụ na "flaping ma ọ bụ flutter ọrụ" (Na re Houghton, 433 F.2d 820, 167 USPQ 687 (CCPA 1970)),
 usoro ngwakọta oyi maka ịmepụta ike (Na re Swartz, 232 F.3d 862, 56 USPQ2d 1703, (Fed. Cir. 2000)),
 usoro maka ịbawanye mmepụta ike nke mmanụ ala mgbe ọkụ na-ere site na ikpughe na mpaghara magnetik (Na re Ruskin, 354 F.2d 395, 148 USPQ 221 (CCPA 1966)),
 ihe ndị a na-amaghị maka ịgwọ ọtụtụ ọrịa kansa (Na re Citron, 325 F.2d 248, 139 USPQ 516 (CCPA 1963)), na
 usoro nke ịchịkwa usoro ịka nká (Na re Eltgroth, 419 F.2d 918, 164 USPQ 221 (CCPA 1970)). United States Patent and Trademark Office Manual of Patent Examination Procedures, 2107.01

United States Patent and Trademark Office Manual of Patent Examination Procedures, 2107.02 ga-emeri ịjụ nke dabeere na uru dị egwu site n'inye ihe akaebe na, "ọ bụrụ na, a tụlere ya n'ozuzu ya, [...] na-eduga onye nwere nkà nkịtị na nka iji kwubie na uru a na-ekwusi ike nwere ike karịa eziokwu".

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