Albert Abrams was a fraudulent American physician, well known during his life for inventing machines, such as the "Oscilloclast" and the "Radioclast", which he falsely claimed could diagnose and cure
Royal Raymond Rife was an American inventor and early exponent of high-magnification time-lapse cine-micrography.
Albert Abrams
…Health fraud Royal Raymond Rife Fishbein, M., The Medical Follies: An Analysis of the Foibles of Some Healing Cults, including Osteopathy, Homeopathy, Chiropractic, and the Electronic…
Royal Raymond Rife in his Lab November 1929
Royal Raymond Rife (age 43) in Popular Science Magazine (June 1931)