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Your computer's web browser will have to conform to the requirements described in this advisory   from the U.S. Patent office to view the patents noted on this page.

July 21, 2006:   Classifying tools as wrenches is arbitrary at the "fringes."   The original intent of this portion of the   HISTORIC PATENT IMAGES   listings was to list the patent numbers of wrench patents including some pliers, tongs, ratchets, and tool patents that include auxiliary wrenches in the drawings or text.   A few patents for wrench manufacturing processes and machinery were also going to be included.

The compiler has since redirected this effort to adding wrench patents to the DATAMP   database.

The 8-digit number in parenthesis is the patent issue date in YYYYMMDD format.