Box 18 Research Files and Patents 1930s and 1940s,           Folders 1-12 & 3 vols.   Series 5 Box 18  RESEARCH FILES AND PATENTS 1930s, 1940s Box 18, Folder 1  General Electric – DP’s handwritten course notes; class photograph of members of the advanced course in engineering, 1936, J.F. Wilcox included … Continue reading Series 5 Research Files and Patents, 1930s and 1940s