Datamp.org Patents https://www.datamp.org/ Recently added patents en-us US Patent: 816,151 https://www.datamp.org/patents/displayPatent.php?id=86105&pn=816,151 WRENCH Patentee: Seburn E. Coffman - Bagwell TX Granted:1906-03-25

Self-adjusting pipe wrench. A known example is marked "PATENTED," with remaining markings illegible .
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