Patents by Inventor Karl-Erik .ANG.strom

Karl-Erik .ANG.strom 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).

  • Method for determining the positions of a plurality of anonymous fixed reference objects for mobile surface transportation and a device for determining said positions
    Patent number: 6012003
    Abstract: Methods and apparatus are disclosed for determining the positions of fixed reference objects for use in controlling the movement of mobile surface transportation units over a surface. The method includes detecting bearings from a measuring point on a mobile apparatus to the reference objects at predetermined times associated with movement of the mobile apparatus over the surface, storing the bearings along with the predetermined time associated therewith, and continuously computing the position of the reference objects and the degree of uncertainty associated with those positions from the bearings whereby the degree of uncertainty is reduced as the mobile apparatus moves over the surface.
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: January 4, 2000
    Assignee: Apogeum AB
    Inventor: Karl-Erik .ANG.strom