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US Patent: 2,796,099
Screw Holding Screwdriver
Patentee:
Hugh E. Dierker (exact or similar names) - Encino, CA

USPTO Classifications:
81/456

Tool Categories:
screwdrivers : screwdriver blades

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jun. 15, 1954
Granted: Jun. 18, 1957

Patent Pictures:
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Description:
Dierker was issued 2 patents on this day, both we screw holding screwdrivers '2796100 was an improvement for surgical use.

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