Patents by Inventor Kosta P. Vlahacos

Kosta P. Vlahacos 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).

  • High frequency scanning SQUID microscope and method of measuring high frequency magnetic fields
    Patent number: 7106057
    Abstract: A scanning SQUID microscope capable of high frequency magnetic field measurements uses a hysteretic SQUID detector and a pulsed sampling technique which permits to extend the bandwidth of the SQUID microscope to above GHz region. The system can be readily incorporated into a 4.2k scanning SQUID microscope for imaging chips at room temperature. By biasing the hysteretic SQUID with pulses of a predetermined amplitude, and adjusting a modulation flux applied to the hysteretic SQUID at a plurality of time delays between the activation of the sample under study and the bias pulse, the hysteretic SQUID can be switched on, and the modulation flux value corresponding to such a switching event as a function of time is considered as representation of the magnetic field emanating from the sample under study.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: September 12, 2006
    Assignees: University of Maryland, National Security Agency
    Inventors: John Matthews, Frederick Charles Wellstood, Soun Pil Kwon, Kosta P. Vlahacos