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US Patent: 159,028
Improvement in electro-magnetic dental tools
Patentee:
George F. Green - Kalamazoo, MI

USPTO Classifications:
310/83, 433/131

Tool Categories:
electrical devices

Assignees:
Samuel S. White - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 13, 1871
Granted: Jan. 26, 1875

Patent Pictures:
USPTO pdf tiff
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Description:
This is one of the very earliest handheld electric drills, if not the earliest.

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