I understand someone has applied for a patent for an item described in the application thus:
“I hereby describe a plate or platter of some suitable material having an outer surface formed as the surface locus of a line moving at constant distance from a geometrical axis parallel to said line, the line being bounded by a pair of radii or modifications thereof at suitable distances apart such that they generate the faces of the said plate or platter whose material and dimensions are chosen to be appropriate for the intended application; and further declare that the plate or platter may be mounted via a central hole or holes of suitable size and shape to allow it to rotate about or be rotated by a concentric, physical axis as needed.”
[Writing that took much of Sibelius’ Pohjola’s Daughter. I should have been a solicitor – they earn by £££-per-word.]