Patents by Inventor Lawrence B. Engman

Lawrence B. Engman 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).

  • Shutter
    Patent number: D251389
    Type: Grant
    Filed: June 23, 1977
    Date of Patent: March 20, 1979
    Assignee: Engmans, Inc.
    Inventor: Lawrence B. Engman
  • Shutter
    Patent number: D251390
    Type: Grant
    Filed: June 23, 1977
    Date of Patent: March 20, 1979
    Assignee: Engmans, Inc.
    Inventor: Lawrence B. Engman