Patents by Inventor Keith Walls

Keith Walls 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).

  • Publication number: 20180141655
    Abstract: A vertical take-off and landing aircraft or drone that has at least two tilting propellers mounted in front of the center of gravity of the wing. These tilting propeller are actively controlled and are capable of providing pitch, roll and yaw control throughout the flight envelop. This method of control can be applied to tilt wing or teal sitter aircraft, conventional or flying wing as well as other wing configuration for example box wing. In hovering flight the wing would be in the vertical position. The tilting propeller would provide pitch and yaw control. Roll control would be provided by differential thrust of the propellers. As the aircraft transitions to forward flight pitch control would be provided by tilting propeller. While yaw and roll control would be provided by a combination of tilting propellers and differential thrust.
    Type: Application
    Filed: November 23, 2016
    Publication date: May 24, 2018
    Inventor: Keith Wall
  • Patent number: 5163148
    Abstract: A new file backup system facilitates backup of a file while it is being updated. The file header includes a set of flags which synchronize the backup operation. After the backup operation has begun, if a portion of the file being backed up requires updating, the portion of the original file to be updated is maintained in the digital data processing system. The backup control program performing the backup backs up the file, substituting the original portions for portions that have been updated. Since the updated portions of the file are maintained during backup, the file can be accessed and updated while the backup operation is taking place.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: November 10, 1992
    Assignee: Digital Equipment Corporation
    Inventor: Keith Walls