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US Patent: 3,021,723
Spindle locking means for portable tools
Patentee:
Reynold Happe - Princeton, NJ

USPTO Classifications:
188/69, 279/150, 408/124, 408/710, 74/411.5, 74/527

Tool Categories:
woodworking machines : handheld power tools : handheld drills

Assignees:
Diehl Manufacturing Co. - Somerville, NJ

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Sep. 10, 1958
Granted: Feb. 20, 1962

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Diehl Manufacturing Co.

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