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US Patent: 4,572,038
Multi-purpose tool
Patentee:
Charles H. Graham (exact or similar names) - Salt Lake City, UT

USPTO Classifications:
81/177.4, 81/439, 81/490

Tool Categories:
screwdrivers : screwdriver bits and holders

Assignees:
Tekna-Tool, Inc. - North Salt Lake, UT

Manufacturer:
Tekna-Tool, Inc. - North Salt Lake, UT

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 08, 1984
Granted: Feb. 25, 1986

Patent Pictures: [ 1 | 2 ]
Patent 4,572,038 - edited selected drawing
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Description:
"... the multi-purpose tool of the present invention ... comprises a handle, a shaft having one end firmly attached to the handle and a distal end extending outwardly from the handle, a cylinder assembly which slidably engages the shaft, a plurality of working tips stored in the cylinder assembly, and a means for selecting and coupling any of the working tips to the distal end of the shaft."

The tool holding "drum" is analogous to the ammunition holding cylinder in a "revolver" firearm.

This patent and D288,168 were used for the TEKNA-TOOL multi-bit screwdriver.

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