Patents by Inventor David Rutledge

David Rutledge has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11913897
    Abstract: A method, system and apparatus for sensing fluids. A fluid sensor is configured to analyze a fluid utilizing impedance spectroscopy. Capacitive impedance of fluids is sensed and measured. Inductive impedance of suspended particles in fluids is measured. An electrochemical fingerprint of the properties of the fluid or of the particles within the fluid is generated. Fluid analytics data is generated from sensor signal data of the fluids under test. Trainable artificial intelligence algorithms are used to generate fluid analytics data.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: February 27, 2024
    Assignee: FluidInsight Ltd.
    Inventors: Patrick Emokpae, David Rutledge, Richard Helfmann, Terry Greeniaus, Chris Holt, Mohammad Abdolrazzaghi, Brad Hesson, Richard Hull, Kenny Xu, Arunkumar Sundaram
  • Publication number: 20070259632
    Abstract: The invention is a radio transmitter that includes an antenna having at least one driven element and at least one reflector element. The driven element is electrically coupled to a radio carrier source. At least one of the driven elements or the at least one reflector element, includes at least one switch to modulate the radio carrier. Also, a secure communication system includes a radio transmitter configured to transmit a modulated signal within an information beam width. Also, a method for modulating a radio signal includes the steps of causing the transmitted carrier signal to be modulated by the modulation signal in response to switching the at least one reflector switch. Also, a method for selecting desirable antenna reflector switch combinations includes performing a mathematical simulation to determine whether the combination of reflector switch positions results in a modulated signal that can be demodulated within an information beam width.
    Type: Application
    Filed: May 4, 2007
    Publication date: November 8, 2007
    Applicant: California Institute of Technology
    Inventors: Aydin Babakhani, David Rutledge, Seyed Hajimiri
  • Publication number: 20060250187
    Abstract: The present invention discloses a distributed power amplifier topology and device that efficiently and economically enhances the power output of an RF signal to be amplified. The power amplifier comprises a plurality of push-pull amplifiers interconnected in a novel circular geometry that preferably function as a first winding of an active transformer having signal inputs of adjacent amplification devices driven with an input signal of equal magnitude and opposite phase. The topology also discloses the use of a secondary winding that matches the geometry of primary winding and variations thereof that serve to efficiently combine the power of the individual power amplifiers. The novel architecture enables the design of low-cost, fully-integrated, high-power amplifiers in the RF, microwave, and millimeter-wave frequencies.
    Type: Application
    Filed: June 30, 2006
    Publication date: November 9, 2006
    Inventors: Ichiro Aoki, Seyed-Ali Hajimiri, David Rutledge, Scott Kee
  • Publication number: 20050030098
    Abstract: The present invention discloses a distributed power amplifier topology and device that efficiently and economically enhances the power output of an RF signal to be amplified. The power amplifier comprises a plurality of push-pull amplifiers interconnected in a novel circular geometry that preferably function as a first winding of an active transformer having signal inputs of adjacent amplification devices driven with an input signal of equal magnitude and opposite phase. The topology also discloses the use of a secondary winding that matches the geometry of primary winding and variations thereof that serve to efficiently combine the power of the individual power amplifiers. The novel architecture enables the design of low-cost, fully-integrated, high-power amplifiers in the RF, microwave, and millimeter-wave frequencies.
    Type: Application
    Filed: September 16, 2004
    Publication date: February 10, 2005
    Inventors: Ichiro Aoki, Seyed-Ali Hajimiri, David Rutledge, Scott Kee