https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=86024&pn=5,483,732 Variable C-shaped retaining ring pliers Patentee: Tian S. Wang - Shaluh Town, Taichung Shiann Taiwan Granted:1996-01-16
Manufactured by OEM Tools - Memphis TN

Pliers for manipulating "C" shaped retaining rings with interchangeable tips that can be clamped in alternate positions to adapt to specific work requirements. Marketed in the U.S. under OEM brand. Informants note OEM Tools was a subsidiary of Great Neck Saw Mfrs.
This is one of 85,317 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=42314&pn=1,896,437 Pipe Wrench Patentee: Andrew B. Allen - Lockland OH Granted:1933-02-07
Manufactured by Steel City Electric Co. - Pittsburgh PA

The patent claims the facing jaw surfaces of differing curvatures, and edges of the outer curved jaw in planes aligning with the bearing surface of the inner jaw. An ALLEN RED HEAD WRENCH has the hammer poll and grooved inner jaw. The patent also appears to correspond to the STEEL CITY ELECTRIC CO. PATENT PENDING "RED HEAD" curved jaw alligator wrench brought to market in 1932 / 1933. This design outwardly resembles the INVOLUTE WRENCH based on patent no. 661,011
This is one of 85,317 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=86022&pn=1,896,699 Chain pipe wrench Patentee: Frank L. Cook - South Bend IN Granted:1933-02-07

A known example has a different "latch:" -- teeth on the chain engage with teeth on the body, and are held by a sliding collar.
This is one of 85,317 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=30616&pn=1,071,666 Wrench Patentees: Charles Hansen - Mingo IA , Conrad Heberer - Mingo IA Granted:1913-08-26
Manufactured by C. & E. Mfg. Co. - Marshalltown IA

Interchangeable heads can adjust at an angle to the shank. and shift position in ratchet fashion due to teeth on their "back" edge, and the conformation of the spring that holds the head in place. PATENT GAZETTE entry provided class 81/59. Produced with four sizes of interchangeable open end heads and a fixed size alligator wrench on the end of the handle as the MARSHALLTOWN by the C & E Mfg. Co. of Marshalltown, Iowa.
This is one of 85,317 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=86021&pn=1,069,858 WRENCH Patentee: Charles Cotton - Burkett NE Granted:1913-08-12

Ratchet wrench with an adjustable work holding jaw component.
This is one of 85,317 patents currently in the database at datamp.org

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