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Level:
file
Collection ID:
NMAH.AC.0196
Repository:
Archives Center, National Museum of American History
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Dates:
1940-1973
Level:
series
Collection ID:
NMAH.AC.0196
Repository:
Archives Center, National Museum of American History

These files were presumably maintained by Henry Tropp for the purposes of research and in preparation of conducting oral history interviews. Arranged alphabetically by last name of the interviewee, this series is approximately 1 cubic foot. Provided is the name of the inventor, the name and/or type of invention, patent number, and date the patent w...

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Level:
file
Collection ID:
NMAH.AC.0196
Repository:
Archives Center, National Museum of American History
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Dates:
1941-1942
Level:
file
Collection ID:
NMAH.AC.0196
Repository:
Archives Center, National Museum of American History
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Dates:
11/25/1970
Level:
file
Collection ID:
NMAH.AC.0196
Repository:
Archives Center, National Museum of American History
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Dates:
8/1/1968
Level:
file
Collection ID:
NMAH.AC.0196
Repository:
Archives Center, National Museum of American History
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Dates:
4/30/1969
Level:
file
Collection ID:
NMAH.AC.0196
Repository:
Archives Center, National Museum of American History
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Dates:
7/15/1970
Level:
file
Collection ID:
NMAH.AC.0196
Repository:
Archives Center, National Museum of American History
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Dates:
5/18/1971
Level:
file
Collection ID:
NMAH.AC.0196
Repository:
Archives Center, National Museum of American History