Patents by Inventor Christopher St. John

Christopher St. John 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: 11549903
    Abstract: A method is provided for subtractively processing a layer of etchable material formed over an electrically conductive surface region of a workpiece. The workpiece is immersed in a liquid solution, generally but not exclusively a conductive solution, that comprises an etchant for the etchable material, so that etching of the etchable material is initiated. An electric circuit is connected to include a control electrode, a reference electrode, and the electrically conductive surface region of the workpiece. The electric circuit is used to monitor the development process dynamically at each of a plurality of intervals during the etching. The etching is terminated when the electrochemical signal satisfies a criterion indicating that the etching is complete.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: January 10, 2023
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Christian Arrington, Amber Lynn Dagel, Jamin Ryan Pillars, Christopher St. John, Jonathan Coleman, Carlos R. Perez, Andrew E. Hollowell, Kalin Baca
  • Patent number: 8885827
    Abstract: Systems and methods to enable a new host device to wirelessly connect to a peripheral device without having to execute a secure pairing process. The method includes storing encryption and connection information for the peripheral device along with information identifying the peripheral device at a server. The new host device is then provided with the information identifying the peripheral device. The new host then uses the information identifying the peripheral device to obtain the encryption and connection information from the server. The new host can then use the encryption and connection information to connect and communicate with the peripheral device. The methods and systems described herein may be used, for example, to loan a peripheral device to the new host device, or to transfer the peripheral device to the new host device.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: November 11, 2014
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Rasmus Abildgren, Christopher St. John, Neil Stewart
  • Publication number: 20140105394
    Abstract: Systems and methods to enable a new host device to wirelessly connect to a peripheral device without having to execute a secure pairing process. The method includes storing encryption and connection information for the peripheral device along with information identifying the peripheral device at a server. The new host device is then provided with the information identifying the peripheral device. The new host then uses the information identifying the peripheral device to obtain the encryption and connection information from the server. The new host can then use the encryption and connection information to connect and communicate with the peripheral device. The methods and systems described herein may be used, for example, to loan a peripheral device to the new host device, or to transfer the peripheral device to the new host device.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 17, 2014
    Applicant: Cambridge Silicon Radio Limited
    Inventors: Rasmus Abildgren, Christopher St. John, Neil Stewart
  • Patent number: 6533381
    Abstract: A method and system for ink jet printing of characters in a variable rate document transport creates a correct column pitch for the document speed. An endorser control system includes a processor having a DMA unit for retrieving column data at a column data rate wherein the processor controls the variable document travel rate. The system further includes a sequencer for converting the column data into dot data. The DMA unit in conjunction with a compare match timer writes the column data from the processor memory to the sequencer at the specified column data rate.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: March 18, 2003
    Inventors: William Donald Chappell, Philip D. Klug, Christopher St. John