Patents by Inventor Richard Arthur Tillson

Richard Arthur Tillson 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).

  • Insulated, weatherproof, and lockable pet door
    Patent number: 6681524
    Abstract: A pet door has interior (22) and exterior frames (28) that assemble to define a tunnel through which a pet may pass. Attaching to the frames are rigid inner (34) and outer doors (36) that are each held closed at a non-vertical angle by force of their own weights. The outer door (36) and interior frame (22) are heavily insulated to reduce heat transfer through the pet door, and the pet door is windproof and extremely weather resistant. A locking bar (48) provides a secure method of locking the doors shut to prevent unwanted entry by animal or human.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: January 27, 2004
    Inventor: Richard Arthur Tillson