Patents by Inventor David Allen Estabrooks

David Allen Estabrooks 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).

  • Lifting-sail boat apparatus and method
    Patent number: 6662738
    Abstract: A lifting-sail rig and method comprising airfoils, or efficient aerodynamically shaped leading edge soft sails, supported by an improved non-interfering fixed mast rig positioned away from the lifting-sail for increased aerodynamic efficiency and ease of sail or airfoil control. Stable sailboat performance is achieved at a higher speed for multihulls and widened beam monohulls for supporting the lifting-sail rig. The improved lifting-sail rig balances the large wind driven forces that have resulted in the capsizing of conventional monohull sailboats, and the pitch poling of multihulls.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: December 16, 2003
    Inventor: David Allen Estabrooks
  • On demand media web electrophotographic printing apparatus
    Patent number: 6633740
    Abstract: The present invention is an improved compact media web electrophotographic printer including photographic full-color, and an automatic web feeding and cutting registration apparatus and method for media web and closely spaced short printouts. This apparatus comprises an improved media web-handling unit for feeding from a recording roll, and an improved sensing system for sensing a buckle and for precisely cutting the short printout at a desired controlled length, and includes an automatic setup prior to each print cycle. In addition a color serial printer having equiangularly arranged process cartridge units movable along guide rails and which is parallel to a common transfer roll which is also seperately movable along guide rails is disclosed.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: October 14, 2003
    Inventor: David Allen Estabrooks
  • On demand media web electrophotographic printing apparatus
    Publication number: 20030035671
    Abstract: The present invention is an improved compact media web electrophotographic printer including photographic full-color, and an automatic web feeding and cutting registration apparatus and method for media web and closely spaced printouts. This apparatus comprises an improved media web-handling unit for feeding from a recording roll, and an improved sensing system for precisely cutting the printout at a desired controlled length.
    Type: Application
    Filed: February 5, 2001
    Publication date: February 20, 2003
    Inventor: David Allen Estabrooks
  • Lifting-sail boat apparatus and method
    Publication number: 20030000441
    Abstract: A lifting-sail rig and method comprising airfoils, or efficient aerodynamically shaped leading edge soft sails, supported by an improved non-interfering fixed mast rig positioned away from the lifting-sail for increased aerodynamic efficiency and ease of sail or airfoil control. Stable sailboat performance is achieved at a higher speed for multihulls and widened beam monohulls for supporting the lifting-sail rig. The improved lifting-sail rig balances the large wind driven forces that have resulted in the capsizing of conventional monohull sailboats, and the pitch poling of multihulls.
    Type: Application
    Filed: July 1, 2002
    Publication date: January 2, 2003
    Inventor: David Allen Estabrooks