https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85829&pn=748,241 Screw and Driver Therefor Patentee: Edwin L. Walter - Scranton PA Granted:1903-12-29

From the Patent description : The primal intent of this invention is to insure firm and positive connection between a screw and its driver without necessitating the expenditure of a great amount of energy to hold the driver in engagement with the screw when turning same, thereby enabling a greater amount of energy to be utilized for effective Work without useless labor and unnecessary fatigue of the operator. The invention provides a novel form of interlocking joint between the screw and its driver, whereby a small amount of force serves to prevent slipping of the driver when in service. The joint comprises an axiallyinclined slot in the head of the screw and a correspondingly-inclined point or hit at the end of the driver, whereby when the screw and driver are held in longitudinal alinement with the said inclined point fitted in the said axially-inclined slot they are interlocked and held against longitudinal displacement.
This is one of 85,119 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85828&pn=1,239,961 Screw-Driver Patentee: Henry W. Pomeroy - Northhampton MA Granted:1917-04-11


This is one of 85,119 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85827&pn=772,593 Screw-Driver Patentee: Paul A. Wagner - Carlstadt NJ Granted:1904-10-18


This is one of 85,119 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85826&pn=456,341 Reversible Screwdriver Patentee: James Reid Jr. - Seymour CT Granted:1891-07-21
Assigned to One Half to William Hagen - Troy NY


This is one of 85,119 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85825&pn=649,422 Combination Tool Patentees: Frank L. Fry - Philadelphia PA , Charles A. Kuenzel - Philadelphia PA Granted:1900-05-08
Manufactured by Fry, Kuenze and Company - Philadelphia PA


This is one of 85,119 patents currently in the database at datamp.org

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