Patents by Inventor Dennis D. Long

Dennis D. Long 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).

  • SQUID Canister with conical coupling cavity
    Patent number: 4567438
    Abstract: A type of Superconducting Quantum Interference Device (SQUID) requires that relatively large, circular, toroidally wound wire coils within a first cavity of a superconducting canister should be inductively coupled to a relatively small SQUID created as an annular ring plus Josephson junctions upon a substrate within a second cavity of the superconducting canister. The required inductive coupling is through a dielectric filled cavity called a coupling cavity which is conical in the shape of a dunce's cap. The conically shaped coupling cavity within the superconducting canister minimizes the parasitic stray inductance which is coupled to the SQUID, and thusly improves the noise performance of the SQUID.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: January 28, 1986
    Assignee: Sperry Corporation
    Inventors: Meir Gershenson, Mark F. Sweeny, Dennis D. Long, David L. Fleming