Patents by Inventor Daniel A. Schumaker

Daniel A. Schumaker 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).

  • Electro-acoustic transducer with diaphragm and blank therefor
    Patent number: 4491698
    Abstract: The transducer diaphragm includes a folded sheet of thin film material, having a front surface and having a plurality of rearwardly extending projections in the form of fins or vanes thereon. Each one of the projections has at least one conductor portion disposed thereon. A substantially flat, thin sheet is secured to form the front face of the diaphragm and to help rigidify the folded sheet. In the preferred form of the invention, each one of the projections is generally channel-shaped throughout its length, and has a bight portion interconnecting a pair of leg portions. In one form of the invention, at least one portion of a conductor is disposed on each one of the projections.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: January 1, 1985
    Assignee: David A. Larson
    Inventors: David A. Larson, Daniel A. Schumaker