Patents by Inventor David Persen

David Persen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5057381
    Abstract: A satellite rechargeable battery configured in a standard C or D size or larger size dry-cell battery housing and includes a standard secondary or charging cell that is preferably a nickel-cadmium cell. The satellite battery includes a head insert that is pivotally mounted to the ends of rods that telescope longitudinally from the battery housing, with the head insert to rotate through ninety degrees (90.degree.) between a first coupled attitude into the battery housing, at its upper or positive pole end, configuring the battery as a standard dry-cell battery, and a second coupled attitude presents a curved undersurface as a seat that extends from the battery housing side to receive a charging battery fitted thereagainst.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: October 15, 1991
    Inventor: David Persen
  • Patent number: 4622507
    Abstract: An integrated battery and recharger that consists of a single casing wherein both a voltage storage cell and a circuit for charging that storage cell are arranged and includes a removable head for attachment to that casing. The assemblage to have the dimensions of a standard "C" cell battery and larger, which head when positioned to the casing in one attitude provides for connection of a positive pole formed in that head to one side of the storage cell, with a battery negative pole connected to the other side of the storage cell, and, when the head is repositioned to its other attitude to the casing, a pair of blades that extend therefrom and are for fitting into a standard household current receptacle, are connected across the charging circuit to charge the storage cell, in which charging attitude the electrical connection to the battery negative pole is broken.
    Type: Grant
    Filed: February 1, 1985
    Date of Patent: November 11, 1986
    Inventor: David Persen
  • Patent number: D350725
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: September 20, 1994
    Assignee: Power Battery Holdings Corporation
    Inventors: David K. Powers, Michael Mahan, David Persen, Thomas Clary