Omni wheel
…US patent 1305535, J. Grabowiecki, "Vehicle wheel", issued 1919-06-03 A variant of the wheel was patented by Josef F. Blumrich in 1972. US patent 3789947, Josef F. Blumrich, "Omnidirectional wheel", issued 1974-02-05 . Blumrich claimed that the design is described in the Book…