Shepard, David H. (David Hammond) 1923-2007 creator mixed material monographic eng 50 1 0.4 Correspondence, notes and notebooks, patents, biographical material, and photographs relating to Shepard's experiments with an optical character recognition device and high-altitude wind power. Open to research. Engineer and inventor. Collection material in English. Optical character recognition Optical character recognition devices Optical character recognition devices Patents Wind power Engineers Inventors mm2008085434 Open to research. DLC 081125 20260227111731.0 mm2008085434