Patents by Inventor Walter C. Palm

Walter C. Palm 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).

  • Multi-layer articles and methods of making same
    Patent number: 6893732
    Abstract: The invention relates to superconductor articles, and compositions and methods for making superconductor articles. The methods can include using a precursor solution having a relatively small concentration of total free acid. The articles can include more than one layer of superconductor material in which at least one layer of superconductor material can be formed by a solution process, such as a solution process involving the use of metalorganic precursors.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: May 17, 2005
    Assignee: American Superconductor Corporation
    Inventors: Leslie G. Fritzemeier, Wei Zhang, Walter C. Palm, Martin W. Rupich
  • Air horn
    Patent number: 4171678
    Abstract: A springless diaphragm-type air horn provided with fixed structure for controlling the amplitude of diaphragm oscillation to thereby enable manufacturing of the horn without necessity for any adjustment of parts to achieve tone control.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: October 23, 1979
    Assignee: Midland-Ross Corporation
    Inventor: Walter C. Palm
  • Single-housing multi-trumpet air horn
    Patent number: 4050405
    Abstract: Disclosed is an air horn comprising a housing and at least two amplifying trumpets attached thereto. Air may be fed from a single source into two sound-generating chambers with which the trumpets are connected by separate passageways to diaphragm-restricted openings of the chambers.
    Type: Grant
    Filed: March 29, 1976
    Date of Patent: September 27, 1977
    Assignee: Midland-Ross Corporation
    Inventor: Walter C. Palm
  • Regulator for vehicle leveling systems
    Patent number: 3955590
    Abstract: A fluid pressure regulator adapted to receive a supply of fluid through a check valve system thereof which prevents admission of fluid above a preselected operating pressure, and discharge of fluid from an apparatus served thereby below, a fail-safe pressure upon complete failure of the pressure supply source.
    Type: Grant
    Filed: November 5, 1974
    Date of Patent: May 11, 1976
    Assignee: Midland-Ross Corporation
    Inventors: Walter C. Palm, James Lyon