Now showing items 21-40 of 619

    • Adaptive on-time control for power factor correction stage light load efficiency 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Wang, Chung-Hsing Hsuan; Xu, Ming Gang; Li, Qian (United States Patent and Trademark Office, 2014-08-12)
      Light load efficiency of a power factor correction circuit is improved by adaptive on-time control and providing for selection between a continuous conduction mode and a discontinuous conduction mode wherein the discontinuous ...
    • Adaptive personal active noise system 

      Virginia Tech Intellectual Properties, Inc.; Saunders, William; Vaudrey, Michael A. (United States Patent and Trademark Office, 2000-06-20)
      An improved personal noise attenuation system which attenuates both tonal and broadband sound and which includes a spatially adjustable acousto-electric sensor and attenuation means including both feedback and feed forward ...
    • Algorithm and implementation system for measuring impedance in the D-Q domain 

      Virginia Tech Intellectual Properties, Inc.; Mattavelli, Paolo; Karimi, Kamiar J.; Wang, Fred; Burgos, Rolando; Boroyevich, Dushan; Fu, Sheau-Wei (Johnny); Francis, Gerald; Shen, Zhiyu (United States Patent and Trademark Office, 2015-09-22)
      A controller and infrastructure for an impedance analyzer measures responses to perturbations to respective phases of a multi-phase system at an interface between stages thereof (which may be considered as a source and ...
    • Alkali corrosion resistant coatings and ceramic foams having superfine open cell structure and method of processing 

      The Center of Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Brown, Jr., Jesse J.; Hirschfeld, Deidre A.; Li, Tingkai (United States Patent and Trademark Office, 1993-12-07)
      Alkali corrosion resistant coatings and ceramic foams having superfine open cell structure are created using sol-gel processes. The processes have particular application in creating calcium magnesium zirconium phosphate, ...
    • Alkylene oxide esters of lignin sulfonic acid 

      Virginia Tech Intellectual Properties, Inc.; Glasser, Wolfgang G.; Dhara, Kaliprasanna (United States Patent and Trademark Office, 1992-04-07)
      Lignin sulfonates are converted into sulfonic acid esters by blocking free phenolic hydroxyl groups on the lignin sulfonates from reaction with a suitable protective group, subjecting the blocked lignin sulfonate in aqueous ...
    • Amine compounds and curable compositions derived therefrom 

      Virginia Tech Intellectual Properties, Inc.; Wilkes, Garth L.; Li, Chenghong (United States Patent and Trademark Office, 2003-01-14)
      Disclosed are compounds produced by a process comprising the step of reacting an amine reactant with an epoxide reactant to form a hydrolytically stable carbon-nitrogen bond therebetween, wherein at least one of the amine ...
    • Amine compounds and curable compositions derived therefrom 

      Virginia Tech Intellectual Properties, Inc.; Wilkes, Garth L.; Li, Chenghong (United States Patent and Trademark Office, 2006-11-07)
      Disclosed are compounds produced by a process comprising the step of reacting an amine reactant with an epoxide reactant to form a hydrolytically stable carbon-nitrogen bond therebetween, wherein at least one of the amine ...
    • Amine compounds and inhibiting neurotransmitter reuptake 

      MAYO Foundation For Medical Education and Research; Virginia Tech Intellectual Properties, Inc.; Carlier, Paul R.; Richelson, Elliott (United States Patent and Trademark Office, 2004-03-02)
      The invention relates to amine compounds as well as methods and materials involved in modulating neurotransmitter reuptake. Specifically, the invention provides amine compounds, methods for synthesizing amine compounds, ...
    • Amine compounds and inhibiting neurotransmitter reuptake 

      Virginia Tech Intellectual Properties, Inc.; MAYO Foundation For Medical Education and Research; Carlier, Paul R.; Richelson, Elliott (United States Patent and Trademark Office, 2007-05-08)
      The invention relates to amine compounds as well as methods and materials involved in modulating neurotransmitter reuptake. Specifically, the invention provides amine compounds, methods for synthesizing amine compounds, ...
    • Amine compounds and inhibiting neurotransmitter reuptake 

      Virginia Tech Intellectual Properties, Inc.; MAYO Foundation For Medical Education and Research; Carlier, Paul R.; Richelson, Elliott (United States Patent and Trademark Office, 2005-07-05)
      The invention relates to amine compounds as well as methods and materials involved in modulating neurotransmitter reuptake. Specifically, the invention provides amine compounds, methods for synthesizing amine compounds, ...
    • Anaerobic microbe transport assembly and method of using 

      Virginia Polytechnic Institute Educational Foundation, Inc.; Wilkins, Tracy D.; Jimenez-Ulate, Franklin (United States Patent and Trademark Office, 1976-02-17)
      Disclosure is made of a novel assembly for transporting anaerobic microbes from clinical patient to laboratory. The assembly provides a convenient and reliable means of maintaining microbial viability in the critical period ...
    • Analog fourier transform channelizer and OFDM receiver 

      Virginia Tech Intellectual Properties, Inc.; Lehne, Mark; Raman, Sanjay (United States Patent and Trademark Office, 2010-09-21)
      An OFDM receiver having an analog multiplier based I-Q channelizing filter, samples and holds consecutive analog I-Q samples of an I-Q baseband, the I-Q basebands having OFDM sub-channels. A lattice of analog I-Q multipliers ...
    • Analysis system using brokers that access information sources 

      Virginia Polytechnic Institute and State Univ.; Marathe, Madhav V.; Barrett, Christopher L.; Bisset, Keith R. (United States Patent and Trademark Office, 2018-01-16)
      Systems, methods, and computer-readable media for generating a data set are provided. One method includes generating a data set based on input data using a plurality of brokers. The method further includes receiving a ...
    • Anti-islanding detection for three-phase distributed generation 

      Virginia Tech Intellectual Properties, Inc.; Dong, Dong; Boroyevich, Dushan; Mattavelli, Paolo (United States Patent and Trademark Office, 2017-04-25)
      Wobbling the operating frequency of a phase-locked loop (PLL), preferably by adding a periodic variation is feedback gain or delay in reference signal phase allows the avoidance of any non-detection zone that might occur ...
    • Antibacterial compositions and methods of using same 

      Virginia Polytechnic Institute; Sieburth, John McNeill (United States Patent and Trademark Office, 1963-03-19)
    • Antibody for C.difficile 

      Virginia Tech Intellectual Properties, Inc.; Wilkins, Tracy D.; Lyerly, David M. (United States Patent and Trademark Office, 1989-11-07)
      Monoclonal antibody to toxin A of C.difficile has been prepared and is used in an assay for toxin A of C.difficile.
    • Apparatus and method for on-line, real-time analysis of chemical gases dissolved in transformer oil 

      Virginia Polytechnic Institute and State University; Wang, Anbo; Gong, Jianmin; Dong, Bo (United States Patent and Trademark Office, 2014-06-03)
      An inspection probe for directly measuring a transmission spectrum of a solvent oil in a transformer includes a tube having a plurality of apertures spaced along a side of the tube to allow oil to pass therethrough, and ...
    • Apparatus and method for volumetric dilatometry 

      Virginia Polytechnic Institute and State University; Duncan, Paul G.; Christian, Sean M.; Shinpaugh, Kevin Anthony; Marand, Herve (United States Patent and Trademark Office, 2004-04-06)
      Disclosed is a novel apparatus and method for volumetric dilatometry. A volumetric dilatometer includes an optical displacement sensor and a means for using a gap measurement obtained from the displacement sensor application ...
    • Apparatus and method that prevent flux reversal in the stator back material of a two-phase SRM (TPSRM) 

      Virginia Tech Intellectual Properties, Inc.; Ramu, Krishnan; Lobo, Nimal Savio (United States Patent and Trademark Office, 2006-03-21)
      A TPSRM may include a stator, having a plurality of poles and a ferromagnetic or iron back material, and a rotor having a plurality of poles and a ferromagnetic or iron back material. A current flowing through coils wound ...
    • Apparatus and process for the separation of hydrophobic and hydrophilic particles using microbubble column flotation together with a process and apparatus for generation of microbubbles 

      Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan; Adel, Gregory T.; Luttrell, Gerald H. (United States Patent and Trademark Office, 1998-09-29)
      A method and apparatus are disclosed for the microbubble flotation separation of very fine and coarse particles, especially coal and minerals, so as to produce high purity and high recovery efficiency. This is accomplished ...