Patents by Inventor David Warren Neff

David Warren Neff 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).

  • Automatically re-closing a closure difficult for children to open
    Patent number: 4078702
    Abstract: This invention relates to automatic closures of the type in which finger pressure applied to a portion of the closure opens an aperture of a container to which the closure is attached thereby permitting dispensing of granular material from the container. Upon release of finger pressure, the closure self-closes, preventing accidental dispensing of material from the container.
    Type: Grant
    Filed: October 14, 1976
    Date of Patent: March 14, 1978
    Assignee: Pennwalt Corporation
    Inventor: David Warren Neff