National Museum of American History
P.O. Box 37012
MRC 601/Room 1100
Washington, DC 20013-7012
11.3 cu. ft.: document boxes, 50 volumes
Espenschied was born in St. Louis and graduated from Pratt Institute in electrical engineering, 1909; on staff of the Telefunken Wireless Telegraph Company, 1909-10; worked for American Telephone and Telegraph Company in various capacities, 1910-34; directed high-frequency transmission development for Bell Telephone Laboratories, 1934-37. Chief interests seem to have been wide-band and carrier waves and wide band systems for communications. Miscellaneous information on the history of telephonic and wireless communication; considerable personal correspondence about men and events in the field, especially disputed claims of inventions, development, and the like.