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Description
on back: "'Doc' Charles David Herrold, father of radio broadcasting." Established Herrold Laboratories, Herrold College of Engineering. Born Nov. 16, 1875, Fulton, Illinois. Moved to San Jose. Sent 1st wireless telegraph message in California. Developed over 50 electrical devices. Head of Technical Department, Heald College. Stated oldest radio station in US. 1st to use wireless telephone system. October 23, 1913 married Sybil Paull.
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