Patents by Inventor Bert Persson

Bert Persson 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 of controlling noxious insects
    Patent number: 4556010
    Abstract: A method of controlling noxious insects which lay their eggs on standing crops by providing in the area of the crops a light flow the light intensity of which is varied, with cyclic repetition, gradually between a minimum and a maximum, the light intensity returning momentarily between two succeeding cycles.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: December 3, 1985
    Inventors: Bert Persson, Hakan Svensson