Patents by Inventor Walter James Dobbins

Walter James Dobbins 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 testing end closures
    Patent number: 3954003
    Abstract: Improved apparatus for testing end closures for leakage, of the type which includes a test chamber formed by a vertically reciprocable upper chambered member and a fixed lower chambered member having seating means for seating the end closure in registered position thereon, the improvement in the upper chambered member comprising end closure movement preventing means for contacting the end closure to prevent its premature movement and loss of registration from its registered seated position during vertical movement of the upper chambered member.
    Type: Grant
    Filed: June 20, 1975
    Date of Patent: May 4, 1976
    Assignee: American Can Company
    Inventor: Walter James Dobbins