DATE OF APPLICATION: February 3, 1883
DATE ISSUED: March 6, 1883
PATENTEE: Joseph Warren Calef
SOURCE: United States Patent and Trademark Office, Accessed 01 July 2019, <http://pdfpiw.uspto.gov/.piw?PageNum=0&docid=0273461&IDKey>
NOTE: DATAMP.ORG – This improvement on Calef’s April 13, 1880 patent (no. 226,490) changes the shape of the teeth on the handle and sliding jaw.
Both patents were used for the Lowentraut SAMSON self-adjusting wrench.
(DATAMP, Accessed 01 July 2019, <http://datamp.org/patents/displayPatent.php?number=273461&typeCode=0>)
I press on toward the goal to win the prize for which God has called me heavenward in Christ Jesus. Philippians 3:14
