Patents by Inventor Henry D. Walker

Henry D. Walker 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).

  • Battery plate and method of making
    Patent number: 4089990
    Abstract: A battery plate is disclosed having a core of aluminum, for example, which has its oxide coating removed and replaced by a thin film of lead. Such a plate has a higher conductivity and is lighter in weight with superior performance characteristics than a conventional lead-antimony plate.
    Type: Grant
    Filed: March 14, 1974
    Date of Patent: May 16, 1978
    Inventor: Henry D. Walker