Patents by Inventor David M. Shaffer

David M. Shaffer 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).

  • Sealed lead-acid cell having a novel lug, and end cover assembly
    Patent number: 5227266
    Abstract: A sealed lead-acid cell includes a container, a plurality of positive and negative plates alternately interleaved with one another and disposed to opposite ends of the container, primary end cover in sealing engagement with the container which includes electrically conductive means for electrically coupling the lugs of like polarity plates and which is in electrical communication with a terminal post.
    Type: Grant
    Filed: December 4, 1991
    Date of Patent: July 13, 1993
    Assignee: GNB Industrial Battery Company
    Inventors: David M. Shaffer, Joseph J. Jergl