Patents by Inventor John Christ

John Christ 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: 10068562
    Abstract: The dual-chamber whistle is a sound producing device that creates a first air flow, a second air flow and a third air flow within the dual-chamber whistle. The basic sound of the dual-chamber whistle is generated by a first turbulence created the interaction of the first air flow and the second air flow. The third air flow also interacts with both the first air flow and the second air flow to create a second turbulence. This second turbulence creates an additional sound called the oversound. While actual patterns of turbulences created in both the first turbulence and the second turbulence are essentially random, the human psychological response to the oversound is to interpret the oversound as an actual call for help. The dual-chamber whistle comprises an intake, an exhaust, and a router which creates a complex air flow.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: September 4, 2018
    Inventor: John Christ
  • Publication number: 20090008554
    Abstract: An improved system for infrared (IR) imaging of terrain is disclosed wherein or or more IR cameras may be used at one or more locations to record images at multiple focal planes. The images are all taken of the same field of view but at varied focal planes. Global Positioning Satellite (GPS) may be used to track each camera location and each camera captures images of the object. Information regarding the orientation of the camera may also be measured. The digital information from the images from each camera at varying focal planes, the distance from the object to each camera, orientation of camera and the GPS location of each camera is transferred to a computer where the data is processed through the use of merging and photogrammetry software utilizing appropriate algorithms to convert the multiple images into a two-dimensional or three-dimensional image with improved depth of field.
    Type: Application
    Filed: November 28, 2007
    Publication date: January 8, 2009
    Applicant: Northrop Grumman Corporation
    Inventors: John Douglas Weir, Robert John Christ, Nils Jakob Fonneland
  • Publication number: 20080111074
    Abstract: A system for visual inspection of coated substrates is disclosed. Painted substrates can be inspected for environmental and physical damage such as corrosion and cracks without removing the paint through the use of infrared imaging. The present invention provides the ability to view abnormalities or defects in the substrate at an increased depth of field. This is accomplished by taking multiple images of the substrate at different focal planes then using computer software to merge the images. The merged image is in focus across the different focal planes and may also be viewed in three-dimensions.
    Type: Application
    Filed: May 1, 2007
    Publication date: May 15, 2008
    Applicant: Northrop Grumman Corporation
    Inventors: John Douglas Weir, Robert John Christ, Nils Jakob Fonneland
  • Publication number: 20070064947
    Abstract: The present application relates to an authentication process and system for a wireless communication system between a host device and a client device. This authentication process and system can make the confirmation of the authentication easier and clearer.
    Type: Application
    Filed: September 22, 2005
    Publication date: March 22, 2007
    Inventors: Chao King, John Christ
  • Publication number: 20070019932
    Abstract: The present application relates to a digital photo album producing apparatus which can produce the digital photo album file so that a player for a removable optical storage medium can decode and display the digital photo album file, and the index file so that the index file comprises still thumbnail image data and pointer which is a command to jump to a certain chapter or segment of digital photo album file including still image or movie corresponding to the thumbnail image.
    Type: Application
    Filed: July 19, 2005
    Publication date: January 25, 2007
    Inventors: Chao King, John Christ
  • Publication number: 20060177153
    Abstract: The present application relates to a digital photo album producing apparatus which can produce the digital photo album file so that reproducing of the image starts with the reproducing of the background music without complicated process for synchronizing the reproducing of the background music and the images.
    Type: Application
    Filed: February 7, 2005
    Publication date: August 10, 2006
    Inventors: Chao King, John Christ
  • Publication number: 20060176781
    Abstract: The present application relates to a digital photo album producing apparatus which can produce the digital photo album file so that reproducing of the image and the reproducing of the background music ends at the same time.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 10, 2006
    Inventors: Chao King, John Christ
  • Publication number: 20060177194
    Abstract: The present application relates to a digital photo album producing apparatus which can produce the digital photo album file so that when the digital photo album is reproduced, both of the background music and audio of movie can be reproduced at good balance.
    Type: Application
    Filed: February 7, 2005
    Publication date: August 10, 2006
    Inventors: Chao King, John Christ
  • Patent number: 5883921
    Abstract: A digital data radio receiver and method evaluates a data signal preamble received on an antenna to determine whether the antenna should receive the data signal following the preamble. The receiver determines frequency offsets from a desired frequency for each symbol in a block of symbols in the preamble, determines the variance of the frequency offsets, determines the average magnitude of the symbols in the block of symbols, where the determination of average magnitude may be performed in parallel with the determination of variance of the frequency offsets, and evaluates the variance and the average magnitude for the block of symbols to determine whether the preamble is actually noise and to assess reception quality at the antenna. In a two antenna diversity receiver system, these steps may be performed first on a block of symbols received at one antenna and then performed on the next block of symbols received at another antenna.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: March 16, 1999
    Assignee: Harris Corporation
    Inventors: Carl Frank Andren, Leonard Victor Lucas, John Christ Fakatselis, Jim Snell
  • Patent number: 5228449
    Abstract: A monitoring system uses infrared photoplethysmography to monitor the pulse of a person wearing a wrist unit, and the wrist unit sends RF signals which describe his heart condition to a base unit. If the wrist unit detects a cardiac arrest or if the wearer manually signals an emergency, both the wrist and the base units sound local alarms. The base unit also telephones others outside of the user's home to alert them to the emergency. The wrist unit is designed to be fail-safe and to prevent false alarms. When the wrist unit fails to detect a pulse, it makes several further attempts to detect a pulse before signalling a cardiac arrest emergency. A prioritization and output activation circuit activates wrist unit outputs, including audio signals, an RF signal transmitter, and a display, according to a predetermined priority when more than one condition requiring a response exists.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: July 20, 1993
    Assignee: Athanasios G. Christ
    Inventors: Athanasios G. Christ, John Christ, James M. Childers, IV