Now showing items 445-464 of 619

    • Polyamide containing reissert unit(s) 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Jois, Yajnanarayana H. (United States Patent and Trademark Office, 1993-03-16)
      Polyamide compositions containing Reissert units can be formed by the reaction of an open chain bis Reissert compound or a mono Reissert compound with a diamine and a diacid chloride.
    • Polyarylene ethers and polyarylene sulfides containing phosphine oxide group and modified by reaction with organoamine 

      Virginia Tech Intellectual Properties, Inc.; McGrath, James E.; Mohanty, Dillip K. (United States Patent and Trademark Office, 1992-07-28)
      Phosphine oxide-containing polyarylene ethers and sulfides can be reacted with organoamines to form novel graft copolymers (with monofunctional amines) or novel crosslinked thermosetting network compositions (with ...
    • Polyelectrolyte DNA conjugation and genetic transformation of an animal 

      Virginia Tech Intellectual Properties, Inc.; Velander, William H.; Page, Raymond L.; Johnson, John L. (United States Patent and Trademark Office, 1996-06-04)
      The present invention provides a method of obtaining an organism which has been characterized as having cells containing exogenous genetic material which includes any sequence of DNA that can be distinguished as exogenous ...
    • Pool cleaner with laser range finder system and method 

      Pentair Water Pool and Spa, Inc.; Virginia Tech Intellectual Properties, Inc.; Boothe, Brian J.; Leonessa, Alexander; Cain, Christopher H. (United States Patent and Trademark Office, 2015-07-21)
      Embodiments of the invention provide a pool cleaner control system including a laser range finder with a first laser line generator, a second laser line generator, and a camera. The first laser line generator and the second ...
    • Porcine DC-SIGN, ICAM-3 and LSECtin and uses thereof 

      Virginia Tech Intellectual Properties, Inc.; Meng, Xiang-Jin; Huang, Yaowei (United States Patent and Trademark Office, 2013-04-09)
      The present invention relates to the cloning, identification and characterization of the unique and entire genomic sequences encoding new porcine DC-SIGN and LSECtin proteins, including the novel nucleotide sequences of ...
    • Porcine torque teno virus vaccines and diagnosis 

      Virginia Tech Intellectual Properties, Inc.; Meng, Xiang-Jin; Huang, Yaowei (United States Patent and Trademark Office, 2016-01-05)
      The present invention provides four purified preparation containing a polynucleic acid molecule encoding porcine Torque teno virus (PTTV) genotypes or subtypes PTTV1a-VA, PTTV1b-VA, PTTV2b-VA, and PTTV2c-VA. The present ...
    • Porcine torque teno virus vaccines and diagnosis 

      Virginia Tech Intellectual Properties, Inc.; Meng, Xiang-Jin; Huang, Yaowei (United States Patent and Trademark Office, 2018-02-20)
      The present invention provides four purified preparation containing a polynucleic acid molecule encoding porcine Torque teno virus (PTTV) genotypes or subtypes PTTV1a-VA, PTTV1b-VA, PTTV2b-VA, and PTTV2c-VA. The present ...
    • Porous ceramic, polymer and metal materials with pores created by biological fermentation 

      Virginia Tech Intellectual Properties, Inc.; Pickrell, Gary R. (United States Patent and Trademark Office, 2009-12-15)
      Porous polymers are made by adding biologically active agent and growth substrates (e.g., yeast and sugar, preferably in the presence of water or other suitable fluid) to a polymer forming material, which may be a liquid. ...
    • Porous ceramic, polymer and metal materials with pores created by biological fermentation 

      Virginia Tech Intellectual Properties, Inc.; Pickrell, Gary R. (United States Patent and Trademark Office, 2007-01-02)
      Porous polymers are made by adding biologically active agent and growth substrates (e.g., yeast and sugar, preferably in the presence of water or other suitable fluid) to a polymer forming material, which may be a liquid. ...
    • Portable computer with display unit connected to system unit through conducting hinge 

      Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Moser, Gregory T.; Shewchuck, Jane M. (United States Patent and Trademark Office, 1993-08-17)
      An electrically conductive hinge provides for the transmission of electrical power and signals between a pivotally connected display unit and system unit of a portable computer and eliminates cable connections between the ...
    • Portion of a crib 

      Virginia Tech Intellectual Properties, Inc.; Cromer, III, Archie E. (United States Patent and Trademark Office, 2000-10-24)
    • Portion of a crib 

      Virginia Tech Intellectual Properties, Inc.; Cromer, III, Archie E. (United States Patent and Trademark Office, 2000-10-24)
    • Portion of a crib 

      Virginia Tech Intellectual Properties, Inc.; Cromer, III, Archie E.; Johnson, Bonnie K. (United States Patent and Trademark Office, 2000-12-26)
    • Portion of a crib 

      Virginia Tech Intellectual Properties, Inc.; Cromer, III, Archie E. (United States Patent and Trademark Office, 2000-10-17)
    • Power converters having capacitor resonant with transformer leakage inductance 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Xu, Ming Gang; Ren, Yuancheng (United States Patent and Trademark Office, 2007-03-27)
      Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant ...
    • Power converters having output capacitor resonant with autotransformer leakage inductance 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Xu, Ming Gang; Ren, Yuancheng; Sun, Ju-Lu (United States Patent and Trademark Office, 2007-08-07)
      Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant ...
    • Power supply for supplying AC output power 

      Virginia Tech Intellectual Properties, Inc.; Matsushita Electric Works, Ltd.; Murakami, Yoshinobu; Lee, Fred C.; Maehara, Minoru; Chen, Wei Hsiao; Yamauchi, Tokushi; Nishiura, Koji (United States Patent and Trademark Office, 2000-05-02)
      High voltage stress on the semiconductor devices at light load conditions, high total harmonic distortion (THD) of the line current, and poor crest factor (CF) of lamp current of ''charge pump'' electronic ballast circuits ...
    • Power switch drivers with equalizers for paralleled switches 

      Virginia Tech Intellectual Properties, Inc.; Miao, Zichen; Ngo, Khai D.; Zhang, Lujie (United States Patent and Trademark Office, 2018-06-12)
      Capacitors connected between gate terminals of a plurality of parallel-connected power transistors are charged and discharged in each switching cycle to provide a plurality of power transistor control waveforms from a ...
    • Power-cell switching-cycle capacitor voltage control for modular multi-level converters 

      Virginia Tech Intellectual Properties, Inc.; Wang, Jun; Boroyevich, Dushan; Burgos, Rolando P.; Wen, Bo (United States Patent and Trademark Office, 2018-05-08)
      In a modular multi-level power converter, additional switching states are interleaved between main switching states that control output voltage or waveform. The additional switching states provide current from a DC-link ...
    • Premixing injector for gas turbine engines 

      Virginia Tech Intellectual Properties, Inc.; Electric Jet, LLC; O'Brien, Walter F.; Homitz, Joseph; Sykes, David M.; Vandsburger, Uri; LePera, Stephen D. (United States Patent and Trademark Office, 2011-01-18)
      A premixing injector for use in gas turbine engines assists in the lean premixed injection of a gaseous fuel/air mixture into the combustor of a gas turbine. The premixing injector is designed to mix fuel and air at high ...