Several cases support and further develop the Art Recognized Suitability doctrine. The MPEP 2144.07 cites two additional cases: In re Leshin: “In re Leshin, 277 F.2d 197, 125 USPQ 416 (CCPA 1960) (selection of a known plastic to make a container of a type made of plastics prior to the invention was held to be…

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