Patents by Inventor John D. Williamson

John D. Williamson 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: 12085851
    Abstract: A pressure sensor manifold is provided that resolves issues caused by accumulated particles and bubbles to improve print head performance. The pressure sensor manifold includes a fluid inlet, a fluid outlet, and a dome-shape cavity connecting with both the fluid inlet and the fluid outlet. The fluid inlet has a first interior cross-section, and the fluid outlet has a second interior cross-section. The dome-shape cavity has an apex. A line that is tangential to the apex passes through a plurality of points on both the first interior cross-section of the fluid inlet and the second interior cross-section of the fluid outlet.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: September 10, 2024
    Assignee: Canon Kabushiki Kaisha
    Inventors: John D. Williamson, Steven C. Shackleton
  • Publication number: 20220100083
    Abstract: A pressure sensor manifold is provided. The pressure sensor manifold includes a fluid inlet, a fluid outlet, and a dome-shape cavity connecting with both the fluid inlet and the fluid outlet. The fluid inlet has a first interior cross-section, and the fluid outlet has a second interior cross-section. The dome-shape cavity has an apex. A line that is tangential to the apex passes through a plurality of points on both the first interior cross-section of the fluid inlet and the second interior cross-section of the fluid outlet.
    Type: Application
    Filed: September 28, 2020
    Publication date: March 31, 2022
    Inventors: John D. Williamson, Steven C. Shackleton
  • Patent number: 5280286
    Abstract: An antenna system (20) in transponder article surveillance and identification system (10) employs a separate interrogating transmitting antenna (31) and interrogating receiving antenna (41) both of which are circularly polarized in opposite hand senses whereby very little of a transmitted electromagnetic interrogation signal is coupled to the interrogation receiving antenna (41) and reflections from nearby surfaces are transparent, significantly improving system performance. Interrogating transmitting antenna (31) and interrogating receiving antenna (41) are cavity-backed, crossed-dipole-fed antennas producing a substantially hemispherical radiation pattern. Transponder (11) is mounted together with a dipole antenna (50) on a tag (13) carried on each article to be identified.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: January 18, 1994
    Assignee: Smart Tag Systems, Inc.
    Inventor: John D. Williamson
  • Patent number: 4658237
    Abstract: An alarm system (10) for detecting unauthorized intrusion into a vehicle and determining the location of such vehicle includes a vehicle alarm (11) and one or more networks (12, 13, 14) for receiving the output signal from vehicle alarm (11). Vehicle alarm (11) includes a transmitter (40) for broadcasting a low frequency modulated radio frequency alarm signal at the citizen band distress frequency and a control unit (25) for selectively activating the alarm upon a drop in the voltage magnitude of the vehicle power supply (27) induced by an unauthorized intrusion. Networks (12, 13, 14) respectively include citizen band radio detectors (15), mobile dedicated alarm detectors (16), and fixed dedicated alarm detectors (17) accompanied by a display unit (18).
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: April 14, 1987
    Assignee: Omnitronics Research Corporation
    Inventor: John D. Williamson
  • Patent number: 4335710
    Abstract: Brain wave patterns associated with relaxed and meditative states in a subject are gradually induced without deleterious chemical or neurological side effects. A white noise generator (11) has the spectral noise density of its output signal modulated in a manner similar to the brain wave patterns by a switching transistor (18) within a spectrum modulator (12). The modulated white noise signal is amplified by output amplifier (13) and converted to an audio signal by acoustic transducer (14). Ramp generator (16) gradually increases the voltage received by and resultant output frequency of voltage controlled oscillator (17) whereby switching transistor (18) periodically shunts the high frequency components of the white noise signal to ground.
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: June 22, 1982
    Assignee: Omnitronics Research Corporation
    Inventor: John D. Williamson
  • Patent number: 4142067
    Abstract: A speech analyzer is provided for determining the emotional state of a person by analyzing pitch or frequency perturbations in the speech pattern. The analyzer determines null points or "flat" spots in a FM demodulated speech signal and it produces an output indicative of the nulls. The output can be analyzed by the operator of the device to determine the emotional state of the person whose speech pattern is being monitored.
    Type: Grant
    Filed: April 11, 1978
    Date of Patent: February 27, 1979
    Inventor: John D. Williamson