Patents by Inventor Michael E. Gillis

Michael E. Gillis 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).

  • Patent number: 4329082
    Abstract: The present shiplift apparatus has a horizontal lift platform with eight lift points (four on each side along the length of the platform). Four lift motors are provided, each operating a first cable for lifting the platform at a lift point which is located toward the longitudinal, midpoint of the platform and a second cable for lifting the platform at a lift point near one end or the other of the platform. Each second cable is connected to a linear actuator for leveling up the platform independent of the lift motors.
    Type: Grant
    Filed: May 22, 1980
    Date of Patent: May 11, 1982
    Inventor: Michael E. Gillis