US Patent: 1,740,055 - Expansive bit


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US Patent: 1,740,055

Expansive bit

Patentee:

John Herbert Abramson (exact or similar names) - Rockford, IL

USPTO Classifications:

Tool Categories:

woodworking tools : hand drills : drill bits : adjustable drill bits

Assignees:

Greenlee Brothers & Co. - Rockford, IL

Manufacturer:

Greenlee Brothers & Co. - Rockford, IL

Witnesses:

Unknown

Patent Dates:
Applied:	Mar. 12, 1928
Granted:	Dec. 17, 1929

Patent Pictures:

USPTO (New site tip)
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Vintage Machinery entry for Greenlee Brothers & Co.

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