Now showing items 410-429 of 619

    • One-way packet communication channel with retransmissions 

      Virginia Tech Intellectual Properties, Inc.; Davidson, Boris; Bostian, Charles W. (United States Patent and Trademark Office, 2001-06-12)
      A random access technique for one way channels. With the apparatus and method of this system, each user sends an initial message of stated length to a central receiver. The message is then retransmitted a specified number ...
    • Ophthalmic contact lens with internal fixation light for examination of the optic nerve 

      Center for Innovative Technology; Virginia Commonwealth University; Virginia Polytechnic Institute and State University; Murphy, Kent A.; Richards, David W. (United States Patent and Trademark Office, 1991-06-18)
      An instrument and method for examining the optic nerve head (34) of a patient's eye (14) is disclosed. The instrument is comprised of a gonioscopic lens (10) a lens system (26) where the lens system (26) directs a collimated ...
    • Optic devices formed from melt processable thermoplastic materials having a high refractive index 

      Innotech, Inc., Johnson & Johnson Vision Care; Virginia Tech Intellectual Properties, Inc.; McGrath, James E.; Sekharipuram, Venkateshwaran N. (United States Patent and Trademark Office, 1999-12-28)
      This invention relates generally to optic devices such as ophthalmic lenses, lens blanks, and lens preforms, made from a thermoplastic material of a specific formula and a process for forming the same.
    • Optical fiber pressure and acceleration sensor fabricated on a fiber endface 

      Virginia Tech Intellectual Properties, Inc.; Wang, Anbo; Zhu, Yizheng; Wang, Xingwei; Xu, Juncheng (United States Patent and Trademark Office, 2006-05-30)
      A fiber optic sensor has a hollow tube bonded to the endface of an optical fiber, and a diaphragm bonded to the hollow tube. The fiber endface and diaphragm comprise an etalon cavity. The length of the etalon cavity changes ...
    • Optical fiber sensors based on pressure-induced temporal periodic variations in refractive index 

      Virginia Tech Intellectual Properties, Inc.; Wang, Anbo (United States Patent and Trademark Office, 2006-11-21)
      A optical fiber sensor for measuring temperature and/or pressure employs temporally created long period gratings. The gratings may be produced by a periodic change in the refractive index of the fiber along the fiber ...
    • Optical fiber sensors for harsh environments 

      Virginia Tech Intellectual Properties, Inc.; Wang, Anbo; Xu, Juncheng (United States Patent and Trademark Office, 2007-02-06)
      A diaphragm optic sensor comprises a ferrule including a bore having an optical fiber disposed therein and a diaphragm attached to the ferrule, the diaphragm being spaced apart from the ferrule to form a Fabry-Perot cavity. ...
    • Optical fiber with quantum dots 

      Virginia Tech Intellectual Properties, Inc.; Lambda Instruments, Inc.; Holton, Carvel E.; Herz, Erik; Meissner, II, Kenith; Paye, Corey (United States Patent and Trademark Office, 2008-04-22)
      Holey optical fibers (e.g. photonic fibers, random-hole fibers) are fabricated with quantum dots disposed in the holes. The quantum dots can provide light amplification and sensing functions, for example. When used for ...
    • Optical fiber with quantum dots 

      Virginia Tech Intellectual Properties, Inc.; Lambda Instruments, Inc.; Holton, Carvel E.; Herz, Erik; Meissner, II, Kenith; Paye, Corey (United States Patent and Trademark Office, 2006-05-30)
      Holey optical fibers (e.g. photonic fibers, random-hole fibers) are fabricated with quantum dots disposed in the holes. The quantum dots can provide light amplification and sensing functions, for example. When used for ...
    • Optical fiber with quantum dots 

      Virginia Tech Intellectual Properties, Inc.; Lambda Instruments, Inc.; Holton, Carvel E.; Herz, Erik; Meissner, II, Kenith; Paye, Corey (United States Patent and Trademark Office, 2006-11-28)
      Holey optical fibers (e.g. photonic fibers, random-hole fibers) are fabricated with quantum dots disposed in the holes. The quantum dots can provide light amplification and sensing functions, for example. When used for ...
    • Optimal trajectory control for LLC resonant converter for LED PWM dimming 

      Virginia Polytechnic Institute and State University; Lee, Fred C.; Ji, Shu; Feng, Weiyi (United States Patent and Trademark Office, 2016-03-01)
      Pulse width modulation is provided for controlling a resonant power converter, particularly for dimming of light emitting diode arrays without loss of efficiency. Dynamic oscillation due to the beginning of a pulse width ...
    • Optimal trajectory control for LLC resonant converter for soft start-up 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Feng, Weiyi (United States Patent and Trademark Office, 2016-04-19)
      By setting switching instants of a switching circuit of a resonant power converter based on current in a resonant circuit reaching a current limit of a current limitation band, soft start-up of the power converter can be ...
    • Oral treatment of hemophilia 

      The United States of America as represented by the Department of Health and Human Services; Virginia Tech Intellectual Properties, Inc.; Velander, William H.; Matzinger, Polly; Alpan, Oral; Kamala, Tirumalai (United States Patent and Trademark Office, 2007-05-22)
      Disclosed herein is a simple method for the treatment of antigen-deficiency diseases, by orally administering to a subject a therapeutically effective amount of the deficient antigen, wherein the antigen is not present in ...
    • Osmotic bioelectrochemical systems 

      He, Z (2013-01-17)
      A bioelectrochemical system includes an anode, a saline solution chamber, and a cathode. The anode is at least partially positioned within an anode chamber containing an aqueous reaction mixture including one or more organic ...
    • Over-expressing homologous antigen vaccine and a method of making the same 

      The Regents of the University of California; Virginia Tech Intellectual Properties, Inc.; Boyle, Stephen M.; Cravero, Silvio; Corbeil, Lynette B.; Schurig, Gerhardt G.; Srirnaganathan, Nammalwar; Vemulapalli, Ramesh (United States Patent and Trademark Office, 2000-11-21)
      This invention relates to an over-expressing homologous antigen vaccine, a method of producing the same, and use of the vaccine for prophylaxis or treatment of vertebrates at risk of or suffering from disease caused by a ...
    • Over-expressing homologous antigen vaccine and a method of making the same 

      The Regents of the University of California; Virginia Tech Intellectual Properties, Inc.; Boyle, Stephen M.; Cravero, Silvio; Corbeil, Lynette B.; Schurig, Gerhardt G.; Srirnaganathan, Nammalwar; Vemulapalli, Ramesh (United States Patent and Trademark Office, 2004-11-02)
      This invention relates to an over-expressing homologous antigen vaccine, a method of producing the same, and use of the vaccine for prophylaxis or treatment of vertebrates at risk of or suffering from disease caused by a ...
    • Parallel devices having balanced switching current and power 

      Virginia Tech Intellectual Properties, Inc.; Toyota Motor Engineering & Manufacturing North American, Inc.; Wang, Chi-Ming; Mao, Yincan; Miao, Zichen; Ngo, Khai D. (United States Patent and Trademark Office, 2018-10-30)
      A power circuit includes a power source for providing electrical power and two driving transistors being disposed in parallel and receiving electrical power from the power source. Each of the two driving transistors includes ...
    • Patterned molecular self-assembly 

      Virginia Tech Intellectual Properties, Inc.; Liu, Yanjing; Schick, Guy A. (United States Patent and Trademark Office, 2000-09-05)
      A patterned molecular self-assembly is provided. The patterned molecular self-assembly comprises a support having an exposed patterned surface and a non-patterned surface. A compound is selectively adsorbed on the exposed ...
    • Patterned molecular self-assembly 

      Virginia Tech Intellectual Properties, Inc.; Liu, Yanjing; Schick, Guy A. (United States Patent and Trademark Office, 2002-12-10)
      A patterned molecular self-assembly is provided. The patterned molecular self-assembly comprises a support having an exposed patterned surface and a non-patterned surface. A compound is selectively adsorbed on the exposed ...
    • Perturbed square ring slot antenna with reconfigurable polarization 

      The United States of America as represented by the Secretary of Agriculture; Virginia Tech Intellectual Properties, Inc.; Zaghloul, Amir I.; Parent, Mark G; Dorsey, W Mark (United States Patent and Trademark Office, 2013-02-12)
      A reconfigurable polarization antenna includes a microwave dielectric substrate having a ground plane that has a centrally located slot with five conducting patches, four of which form an evenly spaced apart perimeter group ...
    • Pharmaceutical preparations of bioactive substances extracted from natural sources 

      Virginia Tech Intellectual Properties, Inc.; Armadillo Pharmaceuticals, Inc.; Martin, Michael Z.; Ashraf-Khorassani, Mehdi; Taylor, Larry (United States Patent and Trademark Office, 2004-06-08)
      This invention relates to methods of extracting and purifying bioactive substances from various plants and herbs. More specifically the invention relates to methods of extracting and separating bioactive substances from ...