Patents by Inventor John P. Craig

John P. Craig 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).

  • Tamper evident envelope
    Patent number: 4712729
    Abstract: A tamper evident envelope which after closure can be separated into different sections is comprised of front and rear panels joined at their edges except at an opening, a closure flap formed as an extension of the rear panel, a transverse pressure sensitive adhesive closure strip adjacent the opening on the front panel, separators joining the insides of the front and rear panels lengthwise, tear lines along the separators, and adhesive tracks on the flaps and part of the front panel in the regions of the separators which adhere together upon closing the flap.
    Type: Grant
    Filed: July 1, 1986
    Date of Patent: December 15, 1987
    Assignee: Trigon Packaging Systems Limited
    Inventor: John P. Craig