Now showing items 592-611 of 619

    • Universal system structure for low power adapters 

      Virginia Tech Intellectual Properties, Inc.; Li, Qiang; Lee, Fred C.; Huang, Xiucheng (United States Patent and Trademark Office, 2017-12-19)
      A two-stage power converter architecture including an isolation transformer and rectification of the isolation transformer output by an LLC resonant circuit and methodology for operating the same feeds an output voltage ...
    • Use of PLL stability for islanding detection 

      Virginia Tech Intellectual Properties, Inc.; Wang, Fred; Burgos, Rolando; Boroyevich, Dushan; Thacker, Timothy N. (United States Patent and Trademark Office, 2014-09-02)
      A phase detector for a phase-locked loop includes a phase detector that is configured to become unstable, oscillate and drift rapidly in frequency in a predictable manner when a reference frequency signal is not available. ...
    • Use of polymeric catalyst in synthesis of sol-gel derived ceramic materials 

      Virginia Tech Intellectual Properties, Inc.; Brennan, Anthony B.; Wilkes, Garth L. (United States Patent and Trademark Office, 1994-05-31)
      Polymeric catalysts (e.g., polymeric acid catalysts such as poly(styrene)sulfonic acid) can be used in the synthesis of sol-gel derived ceramic materials from metal alkoxides, for example, organic/inorganic hybrid materials ...
    • Using power fingerprinting (PFP) to monitor the integrity and enhance security of computer based systems 

      Virginia Tech Intellectual Properties, Inc.; Reed, Jeffrey H.; Aguayo Gonzalez, Carlos R. (United States Patent and Trademark Office, 2016-02-16)
      Procedures are described for enhancing target system execution integrity determined by power fingerprinting (PFP): by integrating PFP into the detection phase of comprehensive defense-in-depth security; by deploying a ...
    • Using power fingerprinting (PFP) to monitor the integrity and enhance security of computer based systems 

      Virginia Tech Intellectual Properties, Inc.; Reed, Jeffrey H.; Aguayo Gonzalez, Carlos R. (United States Patent and Trademark Office, 2017-01-31)
      Procedures are described for enhancing target system execution integrity determined by power fingerprinting (PFP): by integrating PFP into the detection phase of comprehensive defense-in-depth security; by deploying a ...
    • Using power fingerprinting (PFP) to monitor the integrity and enhance security of computer based systems 

      Virginia Tech Intellectual Properties, Inc.; Reed, Jeffrey H.; Aguayo Gonzalez, Carlos R. (United States Patent and Trademark Office, 2017-01-31)
      Procedures are described for enhancing target system execution integrity determined by power fingerprinting (PFP): by integrating PFP into the detection phase of comprehensive defense-in-depth security; by deploying a ...
    • V^2 power converter control with capacitor current ramp compensation 

      Virginia Tech Intellectual Properties, Inc.; Liu, Pei-Hsin; Lee, Fred C.; Yan, Yingyi (United States Patent and Trademark Office, 2017-03-21)
      Operation of a switching power converter having an output capacitor having a small equivalent series resistance (ESR) is stabilized and jitter reduced by sensing capacitor current with gain and combining the resulting ...
    • Video instrumentation for the analysis of mineral content in ores and coal 

      Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan; Adel, Gregory T.; Luttrell, Gerald H. (United States Patent and Trademark Office, 1995-03-07)
      Mineral content in processed ore and coal content in coal slurries are determined using a video system. A video image is taken of a sample, the video image is digitized, and gray levels are assigned to points or areas on ...
    • Water sample viral contamination detection system 

      Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Ijzerman, M. Marian; Hagedorn, Charles; Falkinham, III, Joseph O. (United States Patent and Trademark Office, 1996-06-18)
      Viral contamination in water samples is detected using a medium which includes both a substrate for .beta.-galactosidase and E. coli with elevated levels of intracellular .beta.-galactosidase. The substrate is chosen to ...
    • Water soluble analogs and prodrugs of taxol 

      Virginia Tech Intellectual Properties, Inc.; Kingston, David G.; Liang, Jingyu (United States Patent and Trademark Office, 1995-05-02)
      Substituted 2'-benzoyl and 2', 7-dibenzoyl taxol derivatives are synthesized which have improved water solubility and stability while maintaining bioactivity. In a preferred embodiment, taxol 2',7-di(sodium 1,2-benzenedi ...
    • Water soluble derivatives of taxol 

      Virginia Tech Intellectual Properties, Inc.; Kingston, David G.; Zhao, Zhi-Yang (United States Patent and Trademark Office, 1991-10-22)
      Sulfonated 2'-acryloyltaxol and sulfonated 2'-O-acyl acid taxol derivatives are synthesized which have improved water solubility and stability while maintaining bio-activity. In particular, 2'-[(3-sulfo-1-oxopropyl)oxy]taxol ...
    • Water soluble derivatives of taxol 

      Virginia Tech Intellectual Properties, Inc.; Kingston, David G.; Zhao, Zhi-Yang (United States Patent and Trademark Office, 1994-10-04)
      Sulfonated 2'-acryloyltaxol and sulfonated 2'-O-acyl acid taxol derivatives are synthesized which have improved water solubility and stability while maintaining bio-activity. In particular, 2'-[(3-sulfo-1-oxopropyl)oxy]taxol ...
    • Water soluble derivatives of taxol 

      Virginia Tech Intellectual Properties, Inc.; Kingston, David G.; Zhao, Zhi-Yang (United States Patent and Trademark Office, 1994-01-11)
      Sulfonated 2'-acryloyltaxol and sulfonated 2'-O-acyl acid taxol derivatives are synthesized which have improved water solubility and stability while maintaining bioactivity. In particular, 2'-[(3-sulfo-1-oxopropyl)oxy]taxol ...
    • Wear reducing compositions and methods for their use 

      Virginia Tech Intellectual Properties, Inc.; Kajdas, Czeslaw; Furey, Michael J. (United States Patent and Trademark Office, 1999-03-09)
      Compositions for reducing wear and friction of rubbing surfaces including mixtures of a cyclic amide and a monoester formed by reacting a dicarboxylic acid and a polyol in substantially equimolar amounts where the dicarboxylic ...
    • Wear reduction using cyclic amide compounds 

      Virginia Tech Intellectual Properties, Inc.; Kajdas, Czeslaw; Furey, Michael J. (United States Patent and Trademark Office, 1998-12-22)
      Method of reducing wear between rubbing surfaces by contacting a surface of a solid material with a cyclic amide before and/or while it is being rubbed against another surface.
    • Wetlay process for manufacture of highly-oriented fibrous mats 

      Virginia Tech Foundation, Inc.; Scheinberg, Stephen P. (United States Patent and Trademark Office, 2002-09-17)
      A mat containing highly machine direction oriented (90% or greater), discontinuous reinforcement fibers, is produced on inclined wire or rotary paper making machinery. Fibers are first uniformly dispersed in an aqueous ...
    • Wide scanning spherical antenna 

      Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Shen, Bing W.; Stutzman, Warren L. (United States Patent and Trademark Office, 1995-10-17)
      A novel method for calculating the surface shapes for subreflectors in a suboptic assembly of a tri-reflector spherical antenna system is introduced, modeled from a generalization of Galindo-Israel's method of solving ...
    • Wideband compact planar inverted-F antenna 

      Virginia Tech Intellectual Properties, Inc.; Stutzman, Warren L.; Huynh, Minh-Chau (United States Patent and Trademark Office, 2004-09-21)
      An improved low profile antenna of the PIPA style is formed from a single piece of useful conductive material and includes a first plate spaced apart from an elongated ground plate. The first and ground plates are ...
    • Wideband compact planar inverted-F antenna 

      Virginia Tech Intellectual Properties, Inc.; Stutzman, Warren L.; Huynh, Minh-Chau (United States Patent and Trademark Office, 2011-09-06)
      An improved low profile antenna of the PIPAPIFA style is formed from a single piece of useful conductive material and includes a first plate spaced apart from an elongated ground plate. The first and ground plates are ...
    • Wireless communication device using time-variant antenna module 

      Virginia Tech Intellectual Properties, Inc.; Intel Corporation; Suh, Seong-Youp; Kesling, W. Dawson; Manteghi, Majid; Salehi, Mohsen Amini; Skinner, Harry G. (United States Patent and Trademark Office, 2016-05-24)
      Embodiments of the present disclosure describe methods, apparatuses, and systems related to a wireless communication device using time-variant antenna. Other embodiments may be described and/or claimed.