Patents by Inventor Timothey Peter Gillespie

Timothey Peter Gillespie 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).

  • PRINTHEAD INTEGRATED CIRCUIT HAVING SENSING AND TEST CIRCUITRY
    Publication number: 20100134554
    Abstract: A printhead IC is provided having ejection nozzles, drive circuitry for sending drive pulses to resistive heaters of the nozzles to cause ejection from the nozzles, sensing circuitry being activated to sense the temperature of the printhead IC and adjust the profile of the sent drive pulses in accordance with the sensed temperature and being de-activated after a period of use, and test circuitry for selectively disabling the resistive heaters when they receive the drive pulses while comparing the resistance of the resistive heaters against a predetermined threshold to assess whether the resistive heaters are defective.
    Type: Application
    Filed: January 31, 2010
    Publication date: June 3, 2010
    Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothey Peter Gillespie, Michael John Webb, Kia Silverbrook