Patents by Inventor Edward A. Hill

Edward A. Hill 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: 6822766
    Abstract: A circuit connected to a linear array of photosensors generates image data representative of information printed on a document and adjusts the gains applied to the outputs of selected ones of the photosensors to eliminate streaks in the image data otherwise due to the selected photosensors imaging debris on an optical reference surface. The circuit determines which photosensors have low output values during a factory scan of a clean white reference surface. During a subsequent user environment calibration scan, low output values are adjusted to the average of their neighbors, but only for locations not identified as having low outputs during the factory scan. The circuit additionally performs a PRNU compensation and further adjusts the gains applied to each of the outputs of the photosensors so that all of their output values have a substantially uniform value.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: November 23, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Edward A. Hill, Craig T. Johnson, Carolyn L. Harris, William D. Amidei
  • Publication number: 20040230815
    Abstract: Authentication of an upgrade to computer readable program code of a target embedded device is accomplished by causing the computer processor of the embedded device to access an unique machine identifier; to access an identifier key associated with the upgrade; to process the identifier key and/or unique machine identifier, such as by decrypting the key and/or encrypting the identifier; to compare the identifier key with the unique machine identifier; and causing the computer processor, if the identifier key matches the unique machine identifier, to enable the upgrade; else, to fail the upgrade.
    Type: Application
    Filed: April 29, 2003
    Publication date: November 18, 2004
    Applicant: International Business Machines Corporation.
    Inventors: Brian Gerard Goodman, Mark Edward Hill, Glen Alan Jaquette, Toshiyuki Shiratori
  • Patent number: 6760144
    Abstract: A micro-electro-mechanical device designed such that the actuating means are only mechanically coupled to the optical components. The device includes a substrate, a mirror supported above the substrate, and a rotatory actuator also supported above the substrate. The mirror and actuator are mechanically coupled via a torsional coupling hinge such that the mirror can be angled and/or tilted by electrostatically driving the rotatory actuator. Advantageously, the micro-mirrors and actuator are fabricated from the same layer during the micro-machining fabrication process. In one embodiment, the mirror is rotatable about a fixed rotation axis. In another embodiment, the mirror is freely rotatable.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: July 6, 2004
    Assignee: JDS Uniphase Corporation
    Inventors: Edward Hill, Ramaswamy Mahadevan, Vijayakumar Rudrappa Dhuler, Robert Wood
  • Publication number: 20040008400
    Abstract: A micro-electro-mechanical device designed such that the actuating means are only mechanically coupled to the optical components. The device includes a substrate, a mirror supported above the substrate, and a rotatory actuator also supported above the substrate. The mirror and actuator are mechanically coupled via a torsional coupling hinge such that the mirror can be angled and/or tilted by electrostatically driving the rotatory actuator. Advantageously, the micro-mirrors and actuator are fabricated from the same layer during the micro-machining fabrication process. In one embodiment, the mirror is rotatable about a fixed rotation axis. In another embodiment, the mirror is freely rotatable.
    Type: Application
    Filed: December 4, 2002
    Publication date: January 15, 2004
    Applicant: JDS Uniphase Corporation
    Inventors: Edward Hill, Ramaswamy Mahadevan, Vijayakumar Rudrappa Dhuler, Robert Wood
  • Patent number: 6596147
    Abstract: MEMS structures are provided that compensate for ambient temperature changes, process variations, and the like, and can be employed in many applications. These structures include an active microactuator adapted for thermal actuation to move in response to the active alteration of its temperature. The active microactuator may be further adapted to move in response to ambient temperature changes. These structures also include a temperature compensation element, such as a temperature compensation microactuator or frame, adapted to move in response to ambient temperature changes. The active microactuator and the temperature compensation element move cooperatively in response to ambient temperature changes. Thus, a predefined spatial relationship is maintained between the active microactuator and the associated temperature compensation microactuator over a broad range of ambient temperatures absent active alteration of the temperature of the active microactuator.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: July 22, 2003
    Assignee: Memscap S.A.
    Inventors: Edward Hill, Robert L. Wood, Ramaswamy Mahadevan
  • Publication number: 20030117679
    Abstract: Methods of forming optoelectronic devices include forming an electrically conductive layer on a first surface of a substrate and forming a mirror backing layer from the electrically conductive layer by forming an endless groove that extends through the electrically conductive layer. A step is then performed to remove a portion of the substrate at a second surface thereof, which extends opposite the first surface. This step exposes a front surface of the mirror backing layer. An optically reflective mirror surface is then formed on the front surface of the mirror backing layer.
    Type: Application
    Filed: December 2, 2002
    Publication date: June 26, 2003
    Inventors: Robert L. Wood, Edward A. Hill
  • Publication number: 20030104260
    Abstract: A receptacle having an end cap, a pliable sidewall, and a fastener, for receiving and retaining a fuel cell stack in its stacked configuration during fabrication of a multi-stack fuel cell assembly, is shown and described. Methods of fabricating the assembly include stacking the fuel cell in the receptacle, compressing the fuel cell, and engaging the fastener to retain the stack in its stacked configuration and, or to retain the stack under at least partial compression.
    Type: Application
    Filed: November 30, 2001
    Publication date: June 5, 2003
    Applicant: Ballard Power Systems Inc.
    Inventors: Graham Edward Hill, Ross William Johnston Bailey, Rae Hartwell, Uwe Pfister
  • Patent number: 6574679
    Abstract: A microprocessor (digital device) with microcode is incorporated in a mechanical device, having analog electrical signaling wires, to send a digital signal containing identifying data of the device to a central computer. The digital signal includes operating ranges and any other information that will allow the central computer system to recognize the mechanical device and automatically incorporate the device's operating characteristics into the total system without disruption. The digital signal is transmitted to the central computer system immediately after a power-on signal is detected by the microprocessor on board the mechanical device.
    Type: Grant
    Filed: July 26, 1999
    Date of Patent: June 3, 2003
    Assignee: International Business Machines Corporation
    Inventors: Alex Chliwnyj, Mark Edward Hill
  • Publication number: 20030072979
    Abstract: A method useful during the assembly of fuel cell stacks having resilient seals and/or MEAs is provided. The method comprises heating fuel cells of a fuel cell stack, and applying a compressive force to the fuel cell stack.
    Type: Application
    Filed: October 15, 2001
    Publication date: April 17, 2003
    Applicant: Ballard Power Systems Inc.
    Inventors: Graham Edward Hill, Paul F. Meharg
  • Patent number: 6542656
    Abstract: Add-drop optical switches include fixed reflectors, such as fixed mirrors, and movable reflectors, such as movable mirrors, wherein none of the fixed reflectors and none of the movable reflectors are oriented orthogonal to one another on a substrate when the movable reflectors that provide the add-drop functionality are in a radiation reflecting position. In preferred embodiments, each of the fixed and movable reflectors is oriented parallel to or at a 70° angle to, the remaining fixed and movable reflectors when the movable reflectors are in the radiation reflecting position. Most preferably, the fixed reflectors and the movable reflectors all are oriented on the substrate in parallel when the movable reflectors are in the radiation reflecting position. By providing these orientations of fixed and movable reflectors, add-drop optical switches may be fabricated on silicon substrates using wet etching along crystallographic planes. High performance add-drop optical switches thereby may be provided.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: April 1, 2003
    Assignee: JDS Uniphase Corporation
    Inventor: Edward A. Hill
  • Patent number: 6535318
    Abstract: Integrated optoelectronic devices include a substrate having an opening therein that extends at least partially therethrough and a ledge extending inwardly from a sidewall of the opening. A pop-up mirror is provided in the opening. The mirror has an underside edge that is supported by an upward facing portion of the ledge when the mirror is in a closed position. A hinge is also provided. The hinge mechanically couples the mirror to the substrate so that the mirror can be rotated from the closed position to an open position.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: March 18, 2003
    Assignee: JDS Uniphase Corporation
    Inventors: Robert L. Wood, Edward A. Hill
  • Patent number: 6496351
    Abstract: MEMS devices include a substrate, an anchor attached to the substrate, and a multilayer member attached to the anchor and spaced apart from the substrate. The multilayer member can have a first portion that is remote from the anchor and that curls away from the substrate and a second portion that is adjacent the anchor that contacts the substrate. Related methods are also disclosed.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: December 17, 2002
    Assignee: JDS Uniphase Inc.
    Inventors: Edward A. Hill, Ramaswamy Mahadevan
  • Patent number: 6491404
    Abstract: A micromechanical apparatus includes a microelectronic substrate and a tiltable body thereon. The tiltable body includes a plate configured to tilt about an axis parallel to the microelectronic substrate and a tilt stop engaging portion disposed axially adjacent the plate. A range of rotation of the plate about the axis is defined by contact of the tilt stop engaging portion with a tilt stop on the substrate. The microelectronic substrate may have an opening therein configured to receive the plate, and the tilt stop may include a surface of the microelectronic substrate adjacent the opening. An actuator, such as an electrostatic actuator, may tilt the tiltable body about the axis. Related operation and fabrication methods are also described.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: December 10, 2002
    Assignee: JDS Uniphase Corporation
    Inventor: Edward A. Hill
  • Patent number: 6490382
    Abstract: Reduced configuration Optical Cross-Connect (OXC) switches can include N inputs to the OXC switch and N outputs from the OXC switch, where N is at least 3. The N×N OXC switch provides N! states, wherein the N! states optically couple any one of the N inputs to any one of the N outputs. The N×N OXC switch also includes a number of switching nodes that are selectively optically coupled to the N inputs and N outputs. Each of the number of switching nodes is configurable in at least one of a switching configuration and a pass-through configuration to provide selectively switched optical radiation therefrom and wherein the number of switching nodes is equal to ceiling [ln(N!)/ln(2)] to provide the N! states of the N×N OXC switch. The N×N OXC switch further includes at least one optical transmission apparatus coupled to at least two of the switching nodes. Related methods are also disclosed.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: December 3, 2002
    Assignee: JDS Uniphase Corporation
    Inventor: Edward A. Hill
  • Publication number: 20020122213
    Abstract: A circuit connected to a linear array of photosensors generates image data representative of information printed on a document and adjusts the gains applied to the outputs of selected ones of the photosensors to eliminate streaks in the image data otherwise due to the selected photosensors imaging debris on the optical reference surface. The circuit determines which photosensors have low output values during a factory scan of a clean white reference surface. During a subsequent user environment calibration scan, low output values are adjusted to the average of their neighbors, but only for locations not identified as having low outputs during the factory scan. The circuit additionally performs a PRNU compensation and further adjusts the gains applied to each of the outputs of the photosensors so that all of their output values have a substantially uniform value.
    Type: Application
    Filed: March 1, 2001
    Publication date: September 5, 2002
    Inventors: Edward A. Hill, Craig T. Johnson, Carolyn L. Harris, William D. Amidei
  • Patent number: 6445842
    Abstract: Microelectromechanical (MEM) Optical Cross-connect (OXC) switches having mechanical actuators are discussed. In particular, the MEM OXC switches can include a plurality of reflectors, wherein each of the plurality of the reflectors is movable to at least one of a respective first reflector position along a respective optical beam path from an associated input of the MEM OXC switch to an associated output thereof and a respective second reflector position outside the optical beam path. A mechanical actuator moves to at least one of a first mechanical actuator position and a second mechanical actuator position.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: September 3, 2002
    Assignee: JDS Uniphase, Inc.
    Inventors: Vijayakumar Rudrappa Dhuler, Edward A. Hill
  • Publication number: 20020118472
    Abstract: A micromechanical apparatus includes a microelectronic substrate and a tiltable body thereon. The tiltable body includes a plate configured to tilt about an axis parallel to the microelectronic substrate and a tilt stop engaging portion disposed axially adjacent the plate. A range of rotation of the plate about the axis is defined by contact of the tilt stop engaging portion with a tilt stop on the substrate. The microelectronic substrate may have an opening therein configured to receive the plate, and the tilt stop may include a surface of the microelectronic substrate adjacent the opening. An actuator, such as an electrostatic actuator, may tilt the tiltable body about the axis. Related operation and fabrication methods are also described.
    Type: Application
    Filed: May 18, 2001
    Publication date: August 29, 2002
    Inventor: Edward A. Hill
  • Patent number: 6428173
    Abstract: Microelectromechanical structures (MEMS) are provided that are adapted to controllably move mirrors in response to selective thermal actuation. In one embodiment, the MEMS moveable mirror structure includes a thermally actuated microactuator adapted to controllably move along a predetermined path substantially parallel to the first major surface of an underlying microelectronic substrate. A mirror is adapted to move accordingly with the microactuator between a non-actuated and an actuated position. In all positions, the mirror has a mirrored surface disposed out of plane relative to the first major surface of the microelectronic substrate. The microactuator provided herein can include various thermal arched beam actuators, thermally actuated composite beam actuators, arrayed actuators, and combinations thereof. The MEMS moveable mirror structure can also include a mechanical latch and/or an electrostatic latch for controllably clamping the mirror in position.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: August 6, 2002
    Assignee: JDS Uniphase, Inc.
    Inventors: Vijayakumar R. Dhuler, Mark David Walters, Edward A. Hill, Allen Bruce Cowen
  • Patent number: 6430738
    Abstract: A method and system for permitting reversible installation of software applications in a data processing system which includes a processor, memory containing a first version of a selected software application and a storage system for receiving a removable storage medium. A removable storage medium which includes at least one alternate version of a selected software application is inserted into the storage system and a user is then prompted to select an alternate version of the selected software application for installation within the data processing system. The existing version of the selected software application within the data processing system is then automatically copied from memory to the removable storage medium prior to initiation of installation of the alternate version of the selected software application in response to a selection of the alternate version, such that the installation may be selectively reversed.
    Type: Grant
    Filed: July 1, 1993
    Date of Patent: August 6, 2002
    Assignee: International Business Machines Corporation
    Inventors: Andrew Louis Gross, Mark Edward Hill, Gerald Damian John, Charley David Lillard, Douglas Eugene Torrens
  • Patent number: 6410361
    Abstract: A MEMS thermal actuator device is provided that is capable of providing linear displacement in a plane generally parallel to the surface of a substrate. Additionally, the MEMS thermal actuator of the present invention may provide for a self-contained heating mechanism that allows for the thermal actuator to be actuated using lower power consumption and lower operating temperatures. The MEMS thermal actuator includes a microelectronic substrate having a first surface and at least one anchor structure affixed to the first surface. A composite beam extends from the anchor(s) and overlies the first surface of the substrate. The composite beam is adapted for thermal actuation, such that it will controllably deflect along a predetermined path that extends substantially parallel to the first surface of the microelectronic substrate. In one embodiment the composite beam comprises two or layers having materials that have correspondingly different thermal coefficients of expansion.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: June 25, 2002
    Assignee: JDS Uniphase Corporation
    Inventors: Vijayakumar R. Dhuler, Edward Hill, Allen Cowen