Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 3,304,817
Wrench with Concave Jaw Teeth
Patentees:
John E. Swanstrom, Jr. - Duluth, MN
Swan Elmer Swanson - Duluth, MN

USPTO Classifications:
81/65.2, 81/68

Tool Categories:
wrenches : pipe wrenches : chain and strap wrenches

Assignees:
Diamond Tool & Horseshoe Co. - Duluth, MN

Manufacturer:
Diamond Tool & Horseshoe Co. - Duluth, MN

Witnesses:
none listed

Patent Dates:
Applied: Feb. 26, 1965
Granted: Feb. 21, 1967

Patent Pictures: [ 1 | 2 ]
John E. Swanstrom, Jr. and S. Elmer Swanson patent February 21, 1967
USPTO pdf tiff
Google Patents
Report data errors or omissions
Description:
The patented features include technical details of the shape of the face which facilitate sharpening, as the main wear points on the teeth are the outer edges of the jaws.

Known examples with the patent number include "Diamalloy Diamond Tool and Horseshoe Co. Duluth, U.S.A."

Patent nos. 514,721, 722,144, 944,468, 1,522,804, 1,824,944 and 2,795,986 are listed as references.

Schroeder, Siegfried & Ryan - patent attorneys

Copyright © 2002-2017 - DATAMP