Patents by Inventor Heinrich Angerer

Heinrich Angerer 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).

  • Surface wave filter having photoresist damping material thereon and method for manufacturing the same
    Patent number: 4604594
    Abstract: A surface wave filter with a wafer-shaped substrate formed of monocrystalline piezoelectric material having a surface, input and output transducers disposed on the surface of the substrate, a coupler for coupling the transducers being spaced apart from the transducers on the surface of the substrate defining zones therebetween, and electric conductor runs being connected to the transducers on the surface of the substrate and having ends, includes a damping layer formed of photoresist material with a plastic base covering substantially the entire surface of the substrate except for a region bounded by the transducers, the coupler, the ends of the electric conductor runs and the zones between the transducers and the coupler, and a method for manufacturing the filter.
    Type: Grant
    Filed: September 15, 1983
    Date of Patent: August 5, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventors: Heinrich Angerer, Badri Sinha