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US Patent: 1,783,070
Screw Driver
Screw holding screwdriver
Patentee:
Fredrick R. Bergmann (exact or similar names) - Pueblo, CO

USPTO Classifications:
81/439, 81/456

Tool Categories:
screwdrivers : screwdriver blades

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 22, 1930
Granted: Nov. 25, 1930

Patent Pictures:
USPTO (New site tip)
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