Further research in The Inland Printer has turned up additional references to phototype processes in the years 1938 to 1941.
October 1938, p. 66 Typecraft Studios offered “type stretching” and “type condensing” services that would enable the printer to do away with the need for handlettering. No details of the process were revealed.
March 1939, p. 72 The Weber Process was briefly discussed with a few examples shown.
August 1939, pp. 38–39 The Weber Process was shown in a lavish two-page spread but Mr. Weber, a New York artist, coyly refused to explain his process. It remained a mystery to the editor of The Inland Printer.