Ruggedized solar cell and process for making the same or the like : Matlow, Sheldon L. and Eugene L. Ralph, Skokie, Ill., assignors to Hoffman Electronics Corp., a corporation of California, United States Patent Office No. 2,984,775, patented May 16, 1961. Field July 9, 1958, Ser. No. 747,397, 10 Claims. (Cl. 317-240)