Manuscripts
Patents for electric heating devices : 1920-1922
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- Description
- Two expired U.S. patents issued to Earl H. Richardson and the Edison Electric Appliance Company for electronic heating devices. Each includes a patent certificate as well as printed applications with descriptions and diagrams of the heating devices.
- Call number
- mssHM 74751-74752
- Provenance
- Gift of Ardis Richardson Deckman, June 22, 1945.
- Find out more
- View in the Library catalog(Opens in new tab)