Patents by Inventor David C. Squire

David C. Squire 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).

  • Method and apparatus for testing the vision of a video display terminal user
    Patent number: 6726327
    Abstract: This invention is a programmable vision testing apparatus and method for use in conducting optometric examinations of video display terminal (VDT) users. The apparatus uses a digital display screen accurately to represent a VDT used under actual work conditions. Further, a plurality of images can be displayed via the vision testing apparatus to provide a convenient and efficient way to test the eyes of VDT users with a wide variety of individual needs.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: April 27, 2004
    Assignee: PRIO Corporation
    Inventors: Jonathan G. Torrey, David C. Squire
  • Method and apparatus for testing the vision of a video display terminal user
    Publication number: 20030090631
    Abstract: This invention is a programmable vision testing apparatus and method for use in conducting optometric examinations of video display terminal (VDT) users. The apparatus uses a digital display screen accurately to represent a VDT used under actual work conditions. Further, a plurality of images can be displayed via the vision testing apparatus to provide a convenient and efficient way to test the eyes of VDT users with a wide variety of individual needs.
    Type: Application
    Filed: December 23, 2002
    Publication date: May 15, 2003
    Applicant: Prio Corporation
    Inventors: Jonathan G. Torrey, David C. Squire
  • Method and apparatus for testing the vision of a video display terminal user
    Patent number: 6513931
    Abstract: This invention is a programmable vision testing apparatus and method for use in conducting optometric examinations of video display terminal (VDT) users. The apparatus uses a digital display screen accurately to represent a VDT used under actual work conditions. Further, a plurality of images can be displayed via the vision testing apparatus to provide a convenient and efficient way to test the eyes of VDT users with a wide variety of individual needs.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: February 4, 2003
    Assignee: PRIO Corporation
    Inventors: Jonathan G. Torrey, David C. Squire
  • Method and apparatus for passive refrigerant retrieval and storage
    Patent number: 5072594
    Abstract: A passive refrigerant retrieval and storage apparatus is shown for retrieving refrigerant from a cooling system prior to servicing the cooling system. The passive apparatus includes a coil collector tube for the refrigerant contained within an insulated housing with an outlet from the collector tube passing through a metering valve into the housing. The collector tube is connected to the condenser outlet of a cooling system and the system compressor operated to pump pressurized liquid refrigerant into the collector tube. A small portion of the refrigerant is discharged through the metering valve into the apparatus housing where it is evaporated and causes extreme subcooling to the refrigerant in the collector tube. The refrigerant that is not evaporated is trapped within the evaporator housing. A return line from the housing to the inlet side of the compressor returns the evaporated refrigerant to the cooling system.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: December 17, 1991
    Inventor: David C. Squire