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US Patent: 666,508
Ratchet mechanism
Patentee:
Zachry T. Furbish - Philadelphia, PA

USPTO Classifications:
74/127

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
North Brothers Manufacturing Co. - Philadelphia, PA

Manufacturer:
North Brothers Manufacturing Co. - Philadelphia, PA

Witnesses:
William A. Barr
Joseph H. Klein

Patent Dates:
Applied: Jun. 25, 1898
Granted: Jan. 22, 1901

Patent Pictures: [ 1 | 2 ]
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"Vintage Machinery" entry for North Brothers Manufacturing Co.

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