Patents by Inventor Alfons Harpaintner

Alfons Harpaintner 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: 4665377
    Abstract: A method of adjusting the values of resistors is described wherein regions of a resistive layer provided on a substrate are removed by means of a laser in dependence on the resistance that is required and/or by cutting marks of a specific shape into the resistive layer. In order to obtain resistors with values which are defined as accurately as possible, and which are free of disturbing inductivity, a point raster is formed in the resistive layer by means of single shots of the laser, with the extent and position of the raster, and/or the spacing between its individual points, and/or the size of the individual points being chosen in relation to the total area of the resistive layer in dependence on the required resistance and further physical values.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: May 12, 1987
    Assignees: Roederstein Spezialfabriken fur Bauelemente der Elektronik, Kondensatoren der Starkstromtechnik GmbH
    Inventor: Alfons Harpaintner