"A scientist working for the U.S. Navy has filed for a patent on a room-temperature superconductor, representing a potential paradigm shift in energy transmission and computer systems."
https://phys.org/news/2019-02-navy-patent-room-temperature-superconductor.html
"The superconducting alternator has received considerable international attention over the last decade, with active programs to develop commercial units underway worldwide. Projected gains in efficiency and potential reductions in mass and construction costs have fueled superconducting alternator research."
https://www.osti.gov/biblio/5468768
Superconducting alternator
https://www.osti.gov/biblio/5334612
Superconducting alternator
https://patents.google.com/patent/US3443128A/en
** Superconducting alternator**
https://patents.google.com/patent/US3252018A/en