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US Patent: 188,978
Adjustable Tap Wrench
Patentee:
Roswell H. St. John - Springfield, OH

USPTO Classifications:
408/240, 81/155, 81/77

Tool Categories:
wrenches : tap wrenches and die stocks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Edward W. Mullikin
A. T. Byers

Patent Dates:
Applied: Mar. 02, 1877
Granted: Mar. 27, 1877

Patent Pictures:
USPTO pdf tiff
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