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US Patent: 489,429
Wrench
Patentee:
Gottfried Brigger (exact or similar names) - Akron, OH

USPTO Classifications:
81/176.1

Tool Categories:
wrenches

Assignees:
Gottfried Brigger - Akron, OH
Casper L. Kempel - Akron, OH

Manufacturer:
Not known to have been produced

Witnesses:
S. Byron Gilchrist
C. H. Dover
C. R. Olin
W. C. Hoy
Patent Dates:
Applied: Jan. 18, 1892
Granted: Jan. 03, 1893

Patent Pictures:
Gottfried Brigger patent January 3, 1893
USPTO (New site tip)
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Description:
Specialized hook spanner designed to correlate with a round nut having notches on its periphery.

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