[orbifold]

As a slight counterpoint (I haven't looked into the claims of the patents too much): There is the well known Kerr-Newman solution of a rotating, charged black hole. It is well known that a relativistic rotating charged disk approximates in the limit of (v = c) the Kerr-Newman solution with (B = 0): https://arxiv.org/pdf/gr-qc/0410109.pdf. However the total field energy of such a rotating disk would be infinite, this is one of these examples in physics, where you run into pathologies. As is remarked in the paper those might be removed by a quantum treatment. For v < c the field energy is finite, which is in any case the only realisable regime.