Patents by Inventor John N. Johnston

John N. Johnston 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: 10306733
    Abstract: An ambient light sensor measures an ambient light level at one point in an illuminated environment, such as a warehouse, office, shop, cold-storage facility, or industrial facility, and provides an indication of the measured ambient light level to a processor. The processor maps the measured ambient light level to an estimated ambient light level at a different point in the illuminated environment from the measured ambient light level (e.g., a “task height” about three feet from a warehouse floor). The processor may determine the difference between the estimated ambient light level and a desired light level at the task height, and may change the artificial illumination provided by a light fixture to make the actual ambient light level at task height match the desired light level at the task height.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: May 28, 2019
    Assignee: Digital Lumens, Inc.
    Inventors: Brian Chemel, John F. Egan, Scott D. Johnston, Steve T. Kondo, Jesse F. Kuhn, Matthew W. Massicotte, Frederick M. Morgan, Colin N. Piepgras, Henry B. Sick, Christopher L. Elledge
  • Patent number: 6086554
    Abstract: An improved surgical suction/irrigation probe assembly is provided. The unique suction/irrigation probe assembly comprises a handpiece configured to accept a source of irrigation fluid and a source of vacuum or suction. Further, the handpiece provides a means for a surgeon to select either irrigation fluid or suction. Moreover, the handpiece has an outlet region capable of accepting a rotatable adaptor. The assembly further comprises a rotatable adaptor which is capable of being placed into engagement with the outlet region of the handpiece. Further, a shaft and fitting assembly is provided which is snapped into the rotatable adaptor and which shaft is utilized to supply either irrigation fluid or suction to a surgical site.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: July 11, 2000
    Assignee: Cabot Technology Corporation
    Inventors: James E. Humphreys, Jr., Donna Allen, John N. Johnston
  • Patent number: 6036672
    Abstract: A seal is adapted for use with a suction and/or irrigation device to prevent fluid flow through a flow passage defined in the device when an instrument is inserted therethrough. The seal includes a wall traversing the flow passage. A peripheral portion of the wall occupies a plane substantially perpendicular to of the flow passage and a central portion of the wall extends away from that plane in a direction toward the device's opening. The central portion of the wall is pierceable by an instrument and the central portion is adapted for sealing contact with an external surface of the instrument upon such insertion. A seal assembly and a suction-irrigation device are also described.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: March 14, 2000
    Assignee: Cabot Technology Corporation
    Inventors: Donna Allen, Austin R. Braganza, James E. Humphreys, Jr., John N. Johnston
  • Patent number: 4731030
    Abstract: Disclosed is a tilt/swivel mechanism for supporting a display monitor. The mechanism includes separate tilt ball and pedestal assemblies which may be snapped together without the use of tools. In like manner, any one of various monitors may be snapped onto the tilt ball assembly to provide a complete data display system.
    Type: Grant
    Filed: January 9, 1987
    Date of Patent: March 15, 1988
    Assignee: Unisys Corporation
    Inventor: John N. Johnston
  • Patent number: 4333155
    Abstract: A calculator having a keyboard alterable by interchanging various keyboard modules is provided by an arrangement wherein a module is insertable into a floating connector which adjusts the space allowed for the module to the size of the module and which provides reliable electrical connection to a main keyboard. Each module is insertable and removable with one hand by providing a resilient camming member attached to the calculator, which mechanically interacts with a locking and releasing member which is connected to the module and is accessible when the calculator is resting on a desk.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: June 1, 1982
    Assignee: Litton Business Systems, Inc.
    Inventor: John N. Johnston
  • Patent number: 4323979
    Abstract: An electronic calculator utilizing a programmable read-only memory (PROM) cartridge for control of a number of the calculator functions is provided with a bezel which is snap-fit into a keyed opening in the calculator housing and guides a connector on the cartridge into simple and reliable electrical connection with a connector in the calculator. The bezel, which is simply and inexpensively constructed of plastic, has at least one bevelled outer surface to insure proper orientation of the bezel in the keyed opening and has at least one bevelled inner surface which cooperates with a corresponding bevelled outer surface on the cartridge to prevent improper orientation on the cartridge during insertion thereof into the bezel. The cartridge cover is also simply and inexpensively constructed of plastic, has self-aligning parts, and may be assembled by using a single screw.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: April 6, 1982
    Assignee: Litton Business Systems, Inc.
    Inventor: John N. Johnston
  • Patent number: 4279525
    Abstract: An acoustical noise attenuating platen for an impact printer including lead material fastened with a thermoplastic compound to the rear surface of a non-rotatable bar.
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: July 21, 1981
    Assignee: Litton Business Systems, Inc.
    Inventor: John N. Johnston
  • Patent number: D266005
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: August 31, 1982
    Assignee: Litton Business Systems, Inc.
    Inventors: Myron Beitler, John N. Johnston