Patents by Inventor Christer Turen

Christer Turen 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 and device for surveying the basal area of a forest stand
    Patent number: 4219939
    Abstract: The present invention relates to a method and device for carrying out a survey of the basal area of a forest stand and the distribution of the individual trees with respect to diameter classes.The device of the invention comprises a caliper combined with a relascope in such a way that a certain position of the caliper corresponds to a certain sighting-angle. Furthermore the device comprises a sight field located at an observation point. When practicing the method of the invention the tree to be measured is calipered. Then the sighting-angle of the relascope is compared to the sight field and by checking if the sight field is within the sighting-angle it is determined whether the measured tree is within its border line circle or not.
    Type: Grant
    Filed: July 19, 1978
    Date of Patent: September 2, 1980
    Inventor: Christer Turen