D. Delaware March 1941 casesPeerless Weighing Vending Mach. Corporation, Etc.John B. Pierce Foundation v. Penberthy Injector Co.Colgate-Palmolive-Peet Co. v. United StatesBuckley v. Music Corporation of AmericaJohn B Pierce Foundation v. Penberthy Injector CoMalcolm v. MacDonaldAlfred Hofmann, Inc., v. Knitting Machines Corp.