Patents Assigned to Rollei-Werke Frank & Heidecke
  • Electronic flash unit
    Patent number: D255689
    Type: Grant
    Filed: May 3, 1978
    Date of Patent: July 1, 1980
    Assignee: Rollei-Werke Frank & Heidecke
    Inventors: Chong Ap, Ong C. Kim, Ernst-Gunther Zobel