Patents by Inventor Helmut Winnacker

Helmut Winnacker 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).

  • Apparatus for charging a hermetically sealed electrical energy source
    Patent number: 3939391
    Abstract: An apparatus for charging an electrical energy source secured within a water-tight or hermetically sealed housing. The apparatus includes a transformer having a primary and secondary coil. The secondary coil is secured within the housing, whereby the housing need not be opened to effect charging of the electrical energy source.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: February 17, 1976
    Assignee: Preussag Aktiengesellschaft
    Inventor: Helmut Winnacker