1893 - Thomas Edison received two U.S. patents. The first was for a "Cut Out for Incandescent Electric Lamps" and another for a "Stop Device" (No. 491,992-3). Also No. 492,150 for "Process of Coating Conductors for Incandescent Lamps."
... After years of internal problems, the SPA suffered a three-way split in 1973. The SPA was renamed the Social Democrats USA by the right-wing leadership ...