Patents by Inventor Albert F. Stevens

Albert F. Stevens 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).

  • Content activated envelope extraction
    Patent number: 4353197
    Abstract: At the content extraction location radiant energy is transmitted through the spread-open envelope. Change in this transmitted energy due to content extraction is sensed and activates removal of the envelope from the extraction location.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: October 12, 1982
    Assignee: Opex Corporation
    Inventors: Albert F. Stevens, Paul E. Haley
  • Content activated envelope extraction
    Patent number: 4124968
    Abstract: At the content extraction location radiant energy is transmitted through the spread-open envelope. Change in this transmitted energy due to content extraction is sensed and activates removal of the envelope from the extraction location.
    Type: Grant
    Filed: July 8, 1977
    Date of Patent: November 14, 1978
    Assignee: Opex Corporation
    Inventors: Albert F. Stevens, Paul E. Haley
  • Extraction of contents from envelopes
    Patent number: 4110958
    Abstract: An additional, sharper curvature is imparted to the curved side of a spread-open envelope at the contents extraction site. This "unsticks" contents which may have clung to that side.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: September 5, 1978
    Inventor: Albert F. Stevens