Now showing items 572-591 of 619

    • Three-phase zero-current-transition (ZCT) inverters and rectifiers with three auxiliary switches 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Li, Yong Bin (United States Patent and Trademark Office, 2002-01-08)
      Zero current transition (ZCT) topologies are presented for three-phase inverters and rectifiers. Such devices are used for example in AC adjustable speed drives for so-called zero-emission vehicles (i.e., electric and ...
    • Time variant antenna for transmitting wideband signals 

      Virginia Tech Intellectual Properties, Inc.; Manteghi, Majid; Salehi, Mohsen Amini (United States Patent and Trademark Office, 2018-11-20)
      A circuit for tuning a resonance frequency of an electrically small antenna. The circuit includes a first source configured for providing a modulation signal, a second source configured for providing a periodic electrical ...
    • Topologies for multiple energy sources 

      Virginia Tech Intellectual Properties, Inc.; Lai, Jih-Sheng (United States Patent and Trademark Office, 2006-11-21)
      A system and method for converting power are disclosed. Briefly described, one embodiment comprises a first power source having a first-source positive terminal and a first-source negative terminal; a second power source ...
    • Transgenic non-human mammals expressing human coagulation factor VIII and von Willebrand factor 

      American National Red Cross; Virginia Tech Intellectual Properties, Inc.; Drohan, William N.; Velander, William H.; Lubon, Henryk (United States Patent and Trademark Office, 2003-02-11)
      A non-human transgenic mammalian animal, as described above, contains an exogenous double stranded DNA sequence stably integrated into the genome of the animal, which comprises cis-acting regulatory units operably linked ...
    • Transgenic non-human mammals expressing human coagulation factor VIII and von Willebrand factor 

      Virginia Polytechnic Institute and State University; American National Red Cross; Drohan, William N.; Velander, William H.; Lubon, Henryk (United States Patent and Trademark Office, 2001-07-03)
      A non-human transgenic mammalian animal, as described above, contains an exogenous double stranded DNA sequence stably integrated into the genome of the animal, which comprises cis-acting regulatory units operably linked ...
    • Transgenic non-human mammals producing fibrinogen in their milk 

      The University of North Carolina at Chapel Hill; The American Red Cross; Virginia Tech Intellectual Properties, Inc.; Drohan, William N.; Velander, William H.; Johnson, John L.; Lubon, Henryk (United States Patent and Trademark Office, 2006-01-10)
      A transgenic, non-human mammalian animal is capable of expressing a heterologous gene for human or other recombinant physiologically functional fibrinogen holoprotein or individual subunit chain polypeptides thereof or a ...
    • Transient performance improvement for constant on-time power converters 

      Virginia Tech Intellectual Properties, Inc.; Li, Qiang; Liu, Pei-Hsin; Lee, Fred C.; Bari, Syed (United States Patent and Trademark Office, 2018-10-23)
      Response of a variable frequency switching constant on-time or adaptive on-time controlled power converter to a large step-up or step-down change in load is improved with a simple circuit that detects magnitude and polarity ...
    • Transition metal complexes of amino acids and related ligands and their use as catalysts, anti-microbials, and anti-cancer agents 

      Virginia Tech Intellectual Properties, Inc.; Merola, Joseph S. (United States Patent and Trademark Office, 2014-09-23)
      The present invention relates to the fields of chemistry and pharmaceuticals. Embodiments of the present invention provide transition metal complexes of amino acids. Transition metal complexes of embodiments of the invention ...
    • Transmitting wideband signals through an electrically small antenna using antenna modulation 

      Virginia Tech Intellectual Properties, Inc.; Manteghi, Majid (United States Patent and Trademark Office, 2018-10-09)
      The present invention provides methods and devices to radiate wideband signals. The devices may include a tunable high Q narrowband antenna having a plurality of ports including a feed port and a tuning port as well as a ...
    • Transparent checkpointing and process migration in a distributed system 

      Virginia Tech Intellectual Properties, Inc.; Varadarajan, Srinidhi; Ruscio, Joseph F. (United States Patent and Trademark Office, 2009-05-19)
      A distributed system for creating a checkpoint for a plurality of processes running on the distributed system. The distributed system includes a plurality of compute nodes with an operating system executing on each compute ...
    • Treatment of hemophilia with human Factor IX produced in mammary tissue of transgenic mammals 

      The American Red Cross; Virginia Tech Intellectual Properties, Inc.; Drohan, William N.; Velander, William H.; Lubon, Henryk; Johnson, representative, Mary Ann (United States Patent and Trademark Office, 2008-09-02)
      Recombinant Factor IX characterized by a high percentage of active protein can be obtained in the milk of transgenic animals that incorporate chimeric DNA molecules according to the present invention. Transgenic animals ...
    • Treatment planning for electroporation-based therapies 

      Virginia Tech Intellectual Properties, Inc.; Robertson, John L.; Davalos, Rafael V.; Garcia, Paulo A.; Rossmeisl, John H.; Neal, II, Robert E. (United States Patent and Trademark Office, 2015-12-01)
      The present invention provides systems, methods, and devices for electroporation-based therapies (EBTs). Embodiments provide patient-specific treatment protocols derived by the numerical modeling of 3D reconstructions of ...
    • Trellis support system 

      Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Stiles, Herbert D. (United States Patent and Trademark Office, 1994-12-20)
      A trellis system which can be used with raspberry and other fruit production includes a plurality of structural units (36) which are essentially two dimensional in shape to allow for flat packing and shipping. Trellis wires ...
    • Trimmed foursquare antenna radiating element 

      Virginia Tech Intellectual Properties, Inc.; Davis, William Allen; Stutzman, Warren L.; Nealy, J. Randall; Monkevich, J. Matthew (United States Patent and Trademark Office, 2000-05-02)
      A foursquare dual polarized moderately wide bandwidth antenna radiating element is provided which, due to its small size and low frequency response, is well suited to array applications. The foursquare element comprises a ...
    • Tube lining apparatus 

      Virginia Tech Intellectual Properties, Inc.; Lu, Guo-Quan; Calata, Jesus N. (United States Patent and Trademark Office, 1999-01-05)
      Tubelining device and technique using a coating-applicator for slip-casting a fluent liner coating onto the internal surface of a tube.
    • Twin-image elimination apparatus and method 

      Virginia Tech Intellectual Properties, Inc.; HAMAMATSU PHOTONICS K.K.; Suzuki, Yoshiji; Shinoda, Kazunori; Wu, Ming H.; Poon, Ting-Chung (United States Patent and Trademark Office, 1998-09-08)
      The twin-image elimination apparatus of the present invention comprises (a) a scanning light source for emitting a scanning light beam; (b) an interference device which converts the scanning light beam from the scanning ...
    • Two dimensional network of actuators for the control of damping vibrations 

      Virginia Tech Intellectual Properties, Inc.; dell'Isola, Francesco; Vidoli, Stefano; Henneke, Edmund (United States Patent and Trademark Office, 2003-04-08)
      An interconnected distributed network of actuator devices for the control of damping vibrations in mechanical structures. The network includes at least two actuators and at least two impedances arranged in parallel with ...
    • Two-stage multichannel LED driver with CLL resonant circuit 

      Virginia Tech Intellectual Properties, Inc.; Li, Qiang; Lee, Fred C.; Chen, Xuebing; Huang, Daocheng (United States Patent and Trademark Office, 2017-01-10)
      In a two-stage power converter providing voltage regulation in a first stage, zero voltage switching (ZVS) is provided in switches in an unregulated, constant frequency second stage of a two-stage power converter by an ...
    • Two-stage single phase bi-directional PWM power converter with DC link capacitor reduction 

      Virginia Tech Intellectual Properties, Inc.; Wang, Ruxi; Wang, Fred; Boroyevich, Dushan; Dong, Dong (United States Patent and Trademark Office, 2015-06-30)
      DC link capacitance in a bi-directional AC/DC power converter using a full-bridge or H-bridge switching circuit can be greatly reduced and the power density of the power converter correspondingly increased by inclusion of ...
    • Two-stage voltage regulators with adjustable intermediate bus voltage, adjustable switching frequency, and adjustable number of active phases 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Xu, Ming Gang; Wei, Jia; Ren, Yuancheng; Zhou, Jinghai (United States Patent and Trademark Office, 2006-07-04)
      A two-stage power converter that dynamically adjusts to output current requirements includes a first stage regulator that provides power to a second stage regulator. The first stage can be a buck converter, and the second ...