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US Patent: 1,212,480
Two-speed mechanism via enclosed gear train
Patentees:
Carl M. Peterson (exact or similar names) - Washington, DC
Samuel N. Hall (exact or similar names) - Memphis, TN

USPTO Classifications:
81/32, 81/36

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Granted: Jan. 16, 1917

Patent Pictures:
USPTO (New site tip)
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