Devices having a fixed receptable with rotating tools, some or all of

Official title: {Devices having a fixed receptable with rotating tools, some or all of these tools being rolls or balls loosely mounted on their axis or loose balls in contact with the side wall or the bottom of the receptacle, e.g. with aerating means; "Devices of the Muller type"}

B22C5/0422 (Devices having a fixed receptable with rotating tools, some or all of) appears on 7 US grants and 5 published applications in this corpus.