Patents by Inventor Olle Engdahl

Olle Engdahl 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).

  • Arrangement for performing position determination
    Patent number: 5313409
    Abstract: An arrangement for one-man surveying, including a measuring station (1) and a target unit (2). A sighting-marker arrangement is provided which can be indicated by an indicator arrangement (7) on the measuring station. The measuring station (1) automatically takes a target seeking mode when the indicator arrangement (7) does not indicate the sighting-marker arrangement and a target following mode, when the indicator arrangement indicates the sighting-marker arrangement. The sighting-marker arrangement includes a combination of a first and a second sighting-marker unit. The first unit has a light source (8) on the target unit (2). The second unit has a light source (9) on the measuring station (1) and a reflector (11) on the target unit (2).
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: May 17, 1994
    Assignee: Geotronics
    Inventors: Rudolf Wiklund, Mikael Herztman, Leif Andersson, Olle Engdahl, Lars Ericsson