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US Patent: 470,778
Attachment for Screwdrivers
Patentee:
Lewis H. Boyden - Boston, MA

USPTO Classifications:
81/453

Tool Categories:
screwdrivers : screwdriver mechanisms

Assignees:
Herbert M. Rowell - Boston, MA

Manufacturer:
Not known to have been produced

Witnesses:
Frank G. Parker
Edward S. Day

Patent Dates:
Applied: Jun. 01, 1891
Granted: Mar. 15, 1892

Patent Pictures:
USPTO pdf tiff
Google Patents
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Description:
Holding quill used to secure screws to the screwdriver bit.

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