Patents by Inventor David C. Johnson

David C. Johnson 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).

  • Publication number: 20130048143
    Abstract: This invention relates in part to a method for preparing a pressure vessel for receiving high purity acetylene at elevated pressure. The method involves providing a porous filler-containing pressure vessel, deep cleaning the porous filler-containing pressure vessel, purifying a solvent, and charging the purified solvent into the deep cleaned, porous filler-containing pressure vessel. The pressure vessel is then charged with high purity acetylene for storage, transport and/or delivery of the high purity acetylene. The high purity acetylene may be useful as a source material for depositing carbon and carbon-containing films in semiconductor applications.
    Type: Application
    Filed: October 31, 2012
    Publication date: February 28, 2013
    Inventors: Xuemei Song, Lloyd Anthony Brown, Thomas Thompson, David C. Johnson
  • Patent number: 8373556
    Abstract: A portable patient communicator (PPC) includes a portable housing that supports a processor coupled to memory for storing medical firmware and wireless radio firmware, first and second radios, a processor, and a power source. Communications between a patient implantable medical device (PIMD) and the first radio of the PPC are effected in accordance with program instructions of the medical firmware, and communications between the second radio of the PPC and the wireless network are effected in accordance with program instructions of the wireless radio firmware. Data from the PIMD is received via the first radio to which a priority level is assigned, such as in a tiered manner. A data transport mechanism is selected among disparate data transport mechanisms based at least in part on the priority level. PIMD data is transmitted to the wireless network using the selected transport mechanism via the second radio.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: February 12, 2013
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: John R. LaLonde, William Mass, Kenneth P. Hoyme, David C. Johnson, Joe Bange, Mark Gryzwa
  • Patent number: 8322383
    Abstract: This invention relates in part to a method for preparing a pressure vessel for receiving high purity acetylene at elevated pressure. The method involves providing a porous filler-containing pressure vessel, deep cleaning the porous filler-containing pressure vessel, purifying a solvent, and charging the purified solvent into the deep cleaned, porous filler-containing pressure vessel. The pressure vessel is then charged with high purity acetylene for storage, transport and/or delivery of the high purity acetylene. The high purity acetylene may be useful as a source material for depositing carbon and carbon-containing films in semiconductor applications.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: December 4, 2012
    Assignee: Praxair Technology, Inc.
    Inventors: Xuemei Song, Lloyd Anthony Brown, Thomas Thompson, David C. Johnson
  • Patent number: 8292016
    Abstract: An axle assembly for a motorcycle having a plurality of drive wheels. The axle assembly is configured to permit a user to replace an endless power-transmitting element without substantially disassembling the axle housing assembly.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: October 23, 2012
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: David C. Johnson, James W. Platt, Chane E. Myers, Harold W. Seeds, Andrew P. Maguire, Manoj V. Bhandiwad
  • Patent number: 8261870
    Abstract: A method for replacing an endless power transmitting element in a motorcycle having a rear axle assembly with a pair of driven wheels. The method includes: removing the bearing caps from the carrier structure; disengaging the shafts from the differential assembly; moving the differential assembly away from carrier structure; mounting the endless power transmitting element about the differential assembly and through an opening in the carrier housing; replacing the bearing caps to the carrier structure; and re-engaging the shafts to the differential assembly.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: September 11, 2012
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: David C. Johnson, James W. Platt, Chane E. Myers, Harold W. Seeds, Andrew P. Maguire, Manoj V. Bhandiwad
  • Patent number: 8216135
    Abstract: An ambulatory repeater for use in automated patient care is presented. A local memory store includes a cryptographic key, sensitive information, and physiological measures. The cryptographic key is uniquely assigned to the implantable medical device prior to implant of the implantable medical device into a patient. The sensitive information is preencrypted under the cryptographic key and physiological measures are measured by the implantable medical device. An authentication module is in receipt of the cryptographic key. A permissions module confirms authorization of an external data processing device against the cryptographic key. A decryption module decrypts the sensitive information with the cryptographic key into decrypted information. A processor is operatively coupled to the local memory store. A communications module exchanges the decrypted information and the physiological measures with the external data processing device over a wireless interface contingent upon the authorization confirmation.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: July 10, 2012
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Donald L. Goscha, Lisa D. Haeder, Veerichetty A. Kadhiresan, David C. Johnson, Muralidharan Srivathsa, Marina Brockway
  • Publication number: 20120118685
    Abstract: A brake disc comprising a core layer and a wear layer, the core layer having a face and an external periphery, the wear layer being attached to the face, wherein the core layer comprises a C-C or refractory carbide first material and a plurality of distinct regions of a second material, the second material having a specific heat capacity and/or a volumetric specific heat capacity higher than the specific heat capacity and/or a volumetric specific heat capacity of the first material
    Type: Application
    Filed: November 17, 2011
    Publication date: May 17, 2012
    Inventors: David C. Johnson, Toby Hutton
  • Publication number: 20110273287
    Abstract: A portable patient communicator (PPC) includes a portable housing that supports a processor coupled to memory for storing medical firmware and wireless radio firmware, first and second radios, a processor, and a power source. Communications between a patient implantable medical device (PIMD) and the first radio of the PPC are effected in accordance with program instructions of the medical firmware, and communications between the second radio of the PPC and the wireless network are effected in accordance with program instructions of the wireless radio firmware. Data from the PIMD is received via the first radio to which a priority level is assigned, such as in a tiered manner. A data transport mechanism is selected among disparate data transport mechanisms based at least in part on the priority level. PIMD data is transmitted to the wireless network using the selected transport mechanism via the second radio.
    Type: Application
    Filed: July 12, 2011
    Publication date: November 10, 2011
    Inventors: John LaLonde, William Mass, Kenneth Hoyme, David C. Johnson, Joe Bange, Mark Gryzwa
  • Publication number: 20110246879
    Abstract: A system and method for replaying a user's interaction with a webpage by requesting playback of user interaction data from a replay server, receiving a media asset from the replay server to allow playback the requested user interaction data, the media asset being pre-fetched for use by a proxy application, periodically requesting and receiving the user interaction data from the replay server, recreating an interaction visualization from the user interaction data, and playing back said interaction visualization based on data received from the replay server.
    Type: Application
    Filed: March 30, 2011
    Publication date: October 6, 2011
    Inventors: Alexei R. White, Andre D. Charland, David C. Johnson, Mitchell Cohen
  • Publication number: 20110200194
    Abstract: An ambulatory repeater for use in automated patient care is presented. A local memory store includes a cryptographic key, sensitive information, and physiological measures. The cryptographic key is uniquely assigned to the implantable medical device prior to implant of the implantable medical device into a patient. The sensitive information is preencrypted under the cryptographic key and physiological measures are measured by the implantable medical device. An authentication module is in receipt of the cryptographic key. A permissions module confirms authorization of an external data processing device against the cryptographic key. A decryption module decrypts the sensitive information with the cryptographic key into decrypted information. A processor is operatively coupled to the local memory store. A communications module exchanges the decrypted information and the physiological measures with the external data processing device over a wireless interface contingent upon the authorization confirmation.
    Type: Application
    Filed: April 27, 2011
    Publication date: August 18, 2011
    Applicant: Cardiac Pacemakers, Inc.
    Inventors: Donald L. Goscha, Lisa D. Haeder, Veerichetty A. Kadhiresan, David C. Johnson, Muralidharan Srivathsa, Marina Brockway
  • Patent number: 7978062
    Abstract: A portable patient communicator (PPC) includes a portable housing that supports a processor coupled to memory for storing medical firmware and wireless radio firmware, first and second radios, a processor, and a power source. Communications between a patient implantable medical device (PIMD) and the first radio of the PPC are effected in accordance with program instructions of the medical firmware, and communications between the second radio of the PPC and the wireless network are effected in accordance with program instructions of the wireless radio firmware. Data from the PIMD is received via the first radio to which a priority level is assigned, such as in a tiered manner. A data transport mechanism is selected among disparate data transport mechanisms based at least in part on the priority level. PIMD data is transmitted to the wireless network using the selected transport mechanism via the second radio.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: July 12, 2011
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: John LaLonde, William Mass, Kenneth Hoyme, David C. Johnson, Joe Bange, Mark Gryzwa
  • Patent number: 7967751
    Abstract: An ambulatory repeater for use in automated patient care is presented. A local memory store includes a cryptographic key, sensitive information, and physiological measures. The cryptographic key is uniquely assigned to the implantable medical device prior to implant of the implantable medical device into a patient. The sensitive information is preencrypted under the cryptographic key and physiological measures are measured by the implantable medical device. An authentication module is in receipt of the cryptographic key. A permissions module confirms authorization of an external data processing device against the cryptographic key. A decryption module decrypts the sensitive information with the cryptographic key into decrypted information. A processor is operatively coupled to the local memory store. A communications module exchanges the decrypted information and the physiological measures with the external data processing device over a wireless interface contingent upon the authorization confirmation.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: June 28, 2011
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Donald L. Goscha, Lisa D. Haeder, Veerichetty A. Kadhiresan, David C. Johnson, Muralidharan Srivathsa, Marina Brockway
  • Patent number: 7955258
    Abstract: An external data processing device to interface with an ambulatory repeater and method thereof is presented. An external data processing device is interfaced in far field telemetric communication with an ambulatory repeater. The external data processing device receives sensitive information preencrypted prior to implant under a cryptographic key uniquely assigned to an implantable medical device over a secure connection from the ambulatory repeater. Physiological measures retrieved from the implantable medical device by the ambulatory repeater are received by the external data processing device over a non-secure connection.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: June 7, 2011
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Donald L. Goscha, Lisa D. Haeder, Veerichetty A. Kadhiresan, David C. Johnson, Muralidharan Srivathsa, Marina Brockway
  • Publication number: 20110005066
    Abstract: A method of forming a photovoltaic cell module uses a cell press having a table and a plate that is spaced from and moveable relative to the table. The method includes supporting the cell with the plate between the plate and the table. A substrate and a tie layer disposed on the substrate are introduced between the cell and the table with the substrate supported by the table and with the tie layer facing the cell. One of the cell and the table are moved toward the other until the cell contacts the tie layer. A vacuum is applied between the cell and the tie layer to evacuate the space between the cell and the tie layer as the cell contacts the tie layer. This evacuation eliminates the possibility of air bubbles being formed between the cell and the tie layer as the cell contacts the tie layer.
    Type: Application
    Filed: March 13, 2009
    Publication date: January 13, 2011
    Inventors: Steven D. Crofoot, Kevin R. Houle, David C. Johnson, Barry M. Ketola
  • Publication number: 20110004277
    Abstract: A system and method for managing locally-initiated medical device interrogation is presented. An interface is provided over which to retrieve patient data recorded and transiently staged by a medical device monitoring physiological measures of a patient. The patient data is periodically retrieved by interfacing to and interrogating the medical device per a pre-defined schedule through the interface. Further retrieval of the patient data is permitted independent of the pre-defined schedule. The system stores remotely-specifiable criteria specified by a caregiver and controls patient-initiated patient data retrieval in accordance with the criteria.
    Type: Application
    Filed: September 15, 2010
    Publication date: January 6, 2011
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: David C. Johnson, Howard D. Simms, Kenneth P. Hoyme, Muralidharan Srivathsa, Benjamin L. Somberg
  • Patent number: 7848811
    Abstract: A system and method determines the posture of a body. The system is first calibrated by attaching it to, or implanted it into, a body, placing the body in particular postures, and generating spectral signatures for each of those postures. Thereafter, the system generates spectral signatures for particular instants in time, correlates these instant signatures with the stored signatures, from which the posture of the body at that instant in time is determined.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: December 7, 2010
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Loell Boyce Moon, David C Johnson, Veerichetty Kadhiresan, Karen Franke, Brandi Tait
  • Publication number: 20100300578
    Abstract: This invention relates in part to a method for preparing a pressure vessel for receiving high purity acetylene at elevated pressure. The method involves providing a porous filler-containing pressure vessel, deep cleaning the porous filler-containing pressure vessel, purifying a solvent, and charging the purified solvent into the deep cleaned, porous filler-containing pressure vessel. The pressure vessel is then charged with high purity acetylene for storage, transport and/or delivery of the high purity acetylene. The high purity acetylene may be useful as a source material for depositing carbon and carbon-containing films in semiconductor applications.
    Type: Application
    Filed: May 27, 2009
    Publication date: December 2, 2010
    Inventors: Xuemei Song, Lloyd Anthony Brown, Thomas Thompson, David C. Johnson
  • Patent number: 7831807
    Abstract: A system and method for modifying the hardware instruction set of an instruction processor is disclosed. The invention utilizes one or more bits of an instruction opcode and one or more programmable bits stored within the instruction processor to generate a branch address. The branch address is then used to address a storage device such as a microcode RAM to retrieve one or more microcode instructions that control execution of the instruction opcode. Address generation is controlled by selecting a previously unused instruction opcode, then modifying the programmable bits as necessary to generate a desired branch address. By loading modified microcode instructions at the branch address, instruction execution can be modified without changing the hardware design.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: November 9, 2010
    Assignee: Unisys Corporation
    Inventors: David C. Johnson, Peter B. Criswell
  • Patent number: 7801612
    Abstract: A system and method for managing locally-initiated medical device interrogation is presented. A noncontinuously coupleable interface is provided over which to retrieve patient data recorded and transiently staged by a medical device monitoring physiological measures of a patient. The patient data is periodically retrieved by interfacing to and interrogating the medical device per a pre-defined schedule defining autonomous patient data retrieval frequency. Further retrieval of the patient data is permitted independent of the pre-defined schedule by enabling operation of the interface based on a remotely-specifiable criteria for controlling locally-initiated patient data retrieval.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: September 21, 2010
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David C. Johnson, Howard D. Simms, Kenneth P. Hoyme, Muralidharan Srivathsa, Benjamin L. Somberg
  • Publication number: 20100233454
    Abstract: Compositions comprise an alternating plurality of ordered layers of a first composition MX and a second composition TX2, wherein M is one of Sn, Pb, Sb, Bi, or a rare earth metal, X is S or Se and T is Ti, V, Cr, Nb, or Ta. In some examples, the alternating plurality of ordered layers conforms to a substrate. In typical examples, each of the ordered layers of the first composition has a common thickness and/or each of the ordered layers of the first material has a common composition. In some examples, each of the ordered layers of the second composition has a common thickness and/or a common composition.
    Type: Application
    Filed: January 25, 2010
    Publication date: September 16, 2010
    Inventors: David C. Johnson, Ngoc T. Nguyen, Qiyin Lin, Colby L. Heideman, Clay Mortensen