Patents by Inventor Don F. Carr

Don F. Carr 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).

  • Building structure with fixed center and movable perimeter roof sections
    Patent number: 5035093
    Abstract: The present invention provides a building structure with a two part roof including a first generally horizontal top fixed roof part and a second roof part extending downwardly outwardly from the first roof part and formed by sliding panels for retractability of the second roof part. The first and second roof parts are separated by a first roof support which is under compression with a second roof support which is under tension being provided below the second roof part.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: July 30, 1991
    Assignee: Blenkhorn and Sawle Limited
    Inventors: Stephen Parazader, Don F. Carr