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Creators:
Kern, George Robert, 1894-1962 (cabinet maker, machinist)
Kern, George Robert, Jr., 1919-1987
National Museum of American History (U.S.). Division of Medical History
Dates:
1936-1970
Size:
3 Cubic feet (9 boxes)
Collection ID:
NMAH.AC.0479
Repository:
Archives Center, National Museum of American History

Blueprints, drawings, patent applications, patents, product photographs, correspondence, bills and receipts, advertising, and published articles related to the Kerns' products. The bulk of the material, 1949-1958, is from George Kern's files. It primarily relates to the development and marketing of the Dentagraph and high speed dental drills before the formation of the Fairfax Manufacturing Company in 1957.

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Creators:
National Museum of American History (U.S.). Division of Electricity and Modern Physics
Hammer, William J. (William Joseph), 1858-1934 (electrical engineer)
Dates:
circa 1847-1989
Size:
36 Cubic feet (124 boxes, 3 map-folders)
Collection ID:
NMAH.AC.0069
Repository:
Archives Center, National Museum of American History

Original documents and papers generated by William J. Hammer and by various companies and individuals with whom he was associated. Includes material related to the research and inventions of Edison, Bell, Tesla, the Curies, etc.

Found In