Patents by Inventor Stephen Hahn

Stephen Hahn 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: 12268813
    Abstract: A device for biofilm removal from an endotracheal tube is disclosed. Such a device may include a hollow catheter having a tip, wherein said device is inserted down an endotracheal tube of an orally intubated patient. Said tip may include a cylindrical central portion and a fin configured to dislodge biofilm from the inner lumen of the endotracheal tube as the device is rotated, either manually or mechanically, inside the endotracheal tube. The fin may be configured as a helix and positioned to spiral around said cylindrical central portion of the tip thereby forming a channel, defined by the pitch of said helix, about the circumference of the cylindrical central portion. Biofilm dislodged from the inner surface of the endotracheal tube by the rotational motion of the fin may be retained within the channel until the tip is removed from the endotracheal tube. The device may further comprise a motor for mechanically rotating the catheter and tip.
    Type: Grant
    Filed: October 22, 2021
    Date of Patent: April 8, 2025
    Inventors: Morgan Bohrer, Stephen Hahn, Michael L'Ecuyer, Alexandra Verne
  • Publication number: 20250054472
    Abstract: Methods and system for music generation. One method comprises defining a phrase structure and a metrical layout, and generating a melody based on the phrase structure and the metrical layout using a probabilistic model of contour-sequences in a machine learning model. The probabilistic model includes a plurality of production rules determined by the machine learning model trained on a dataset of hierarchical analyses, and the contour-sequences defining directional patterns between musical notes extracted from the dataset of hierarchical analyses.
    Type: Application
    Filed: July 31, 2024
    Publication date: February 13, 2025
    Inventors: Stephen Hahn, Cynthia Rudin, Yue Jiang, Simon Mak, Jerry Yin, Rico Zhu
  • Patent number: 11960881
    Abstract: A system and method for simplifying the creation of documentation, and especially software documentation. A software application, referred to as a source metadata tagger and document compiler is used to add metadata to a final output document. This metadata contains identifiers that are associated with various source files. In this way, the system can easily determine which source file is being reviewed and/or flagged by the reviewer. This information can be used by the ticketing/notification system to create a work item for the appropriate developer or development group. This is vastly simpler than the current system, where human intervention is required to determine which source file is being flagged.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: April 16, 2024
    Assignee: Silicon Laboratories Inc.
    Inventors: Nicholas Ryan Wellinghoff, Stephen Hahn, Yi-Yang Chen, Bradford Stewart
  • Publication number: 20220126043
    Abstract: A device for biofilm removal from an endotracheal tube is disclosed. Such a device may include a hollow catheter having a tip, wherein said device is inserted down an endotracheal tube of an orally intubated patient. Said tip may include a cylindrical central portion and a fin configured to dislodge biofilm from the inner lumen of the endotracheal tube as the device is rotated, either manually or mechanically, inside the endotracheal tube. The fin may be configured as a helix and positioned to spiral around said cylindrical central portion of the tip thereby forming a channel, defined by the pitch of said helix, about the circumference of the cylindrical central portion. Biofilm dislodged from the inner surface of the endotracheal tube by the rotational motion of the fin may be retained within the channel until the tip is removed from the endotracheal tube. The device may further comprise a motor for mechanically rotating the catheter and tip.
    Type: Application
    Filed: October 22, 2021
    Publication date: April 28, 2022
    Inventors: Morgan Bohrer, Stephen Hahn, Michael L'Ecuyer, Alexandra Verne
  • Publication number: 20210232391
    Abstract: A system and method for simplifying the creation of documentation, and especially software documentation. A software application, referred to as a source metadata tagger and document compiler is used to add metadata to a final output document. This metadata contains identifiers that are associated with various source files. In this way, the system can easily determine which source file is being reviewed and/or flagged by the reviewer. This information can be used by the ticketing/notification system to create a work item for the appropriate developer or development group. This is vastly simpler than the current system, where human intervention is required to determine which source file is being flagged.
    Type: Application
    Filed: January 24, 2020
    Publication date: July 29, 2021
    Inventors: Nicholas Ryan Wellinghoff, Stephen Hahn, Yi-Yang Chen, Bradford Stewart
  • Patent number: 7779813
    Abstract: A system for a multi-fuel engine includes adjusting delivery of one or more fuels in response to a condition of an ignition spark in the engine. In one example, the system adjusts one or more fuels in response to spark plug ionization detection to improve performance of the engine.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: August 24, 2010
    Assignee: Ford Global Technologies, LLC
    Inventor: Stephen Hahn
  • Publication number: 20070215104
    Abstract: A system for an engine of a vehicle, comprising of a combustion chamber, a delivery system configured to deliver a fuel and a fluid to the combustion chamber, an ignition system including a spark plug configured to deliver a spark to the combustion chamber, and a control system configured to respond to a change in a condition of the ignition system by varying at least one of an amount of the fuel and an amount of the fluid delivered to the combustion chamber to vary a ratio of the fluid and the fuel.
    Type: Application
    Filed: March 17, 2006
    Publication date: September 20, 2007
    Inventor: Stephen Hahn
  • Publication number: 20070149710
    Abstract: The present invention yields a coagent-mediated, grafted copolymer prepared from a free radical-mediated reaction of a mixture containing or made from (a) a first free-radical reactive organic polymer, (b) a second free-radical reactive organic polymer, and (c) a coagent selected from the group consisting of allyl, vinyl, and acrylate coagents, wherein the first and second organic polymers are chemically dissimilar polymers as determined by at least one physical property yet the organic polymers have similar reactivity in radical-mediated additions to the coagent.
    Type: Application
    Filed: November 3, 2006
    Publication date: June 28, 2007
    Applicants: Dow Global Technologies Inc., Queen's University at Kingston
    Inventors: Bharat Chaudhary, Genaro Gutierrez, Malcolm Finlayson, Stephen Hahn, John Parent, Saurav Sengupta
  • Publication number: 20070149626
    Abstract: The present invention is a crosslinkable, expandable polymeric composition comprising a free-radical crosslinkable polymer, a free-radical inducing species, a crosslinking-profile modifier, and a blowing agent. Preferably, the free-radical inducing species is a low temperature free-radical inducing species.
    Type: Application
    Filed: December 24, 2004
    Publication date: June 28, 2007
    Applicant: DOW GLOBAL TECHNOLOGIES, INC.
    Inventors: Yunwa Cheung, Stephen Hahn, Wenbin Liang, Miguel Prieto Goubert, Shaofu Wu
  • Publication number: 20070142866
    Abstract: A cardiac rhythm management (CRM) system includes an implantable medical device that delivers anti-tachyarrhythmia therapies including anti-tachyarrhythmia pacing (ATP) and at least one hemodynamic sensor that senses a hemodynamic signal. When a tachyarrhythmia episode is detected, the CRM system analyzes the hemodynamic signal to determine whether and/or when to deliver an ATP. In one embodiment, a hemodynamic parameter extracted from the hemodynamic signal is used to predict the potential effective of ATP in terminating the detected tachyarrhythmia episode. In another embodiment, a characteristic feature detected from the hemodynamic signal is used to determine an ATP window during which a delivery of ATP is initiated.
    Type: Application
    Filed: December 20, 2005
    Publication date: June 21, 2007
    Inventors: Dan Li, Gerrard Carlson, Stephen Hahn
  • Publication number: 20060264065
    Abstract: A method of forming an air gap within a semiconductor structure by the steps of: (a) using a sacrificial polymer to occupy a space in a semiconductor structure; and (b) heating the semiconductor structure to decompose the sacrificial polymer leaving an air gap within the semiconductor structure, wherein the sacrificial polymer of step (a) is a copolymer of styrene or styrene derivative (such as alpha methyl styrene) and vinylbenzocyclobutene or a vinylbenzocyclobutene derivative. In addition, a semiconductor structure, having a sacrificial polymer positioned between conductor lines, wherein the sacrificial polymer is a copolymer of styrene or styrene derivative and vinylbenzocyclobutene or a vinylbenzocyclobutene derivative.
    Type: Application
    Filed: January 30, 2004
    Publication date: November 23, 2006
    Inventors: Ying So, Stephen Hahn, Robert Kirchhoff, Kenneth Foster
  • Publication number: 20060199914
    Abstract: The invention relates to functionalized interpolymers derived from base olefin interpolymers, which are prepared by polymerizing one or more monomers or mixtures of monomers, such as ethylene and one or more comonomers, to form an interpolymer products having unique physical properties. The functionalized olefin interpolymers contain two or more differing regions or segments (blocks), resulting in unique processing and physical properties.
    Type: Application
    Filed: March 15, 2006
    Publication date: September 7, 2006
    Applicant: Dow Global Technologies Inc.
    Inventors: William Harris, John Weaver, Brian Walther, Stephen Hahn, Yunwa Cheung, Pankaj Gupta, Thoi Ho, Kenneth Reichek, Selim Yalvac, Teresa Karjala, Benjamin Rozenblat, Cynthia Rickey
  • Publication number: 20060116729
    Abstract: An apparatus and method for terminating atrial and ventricular tachyarrhythmias by delivering a voltage pulse to an electrode arrangement that efficiently terminates the tachyarrhythmia. In one embodiment, a voltage pulse is impressed between an electrode located in the coronary sinus and an electrode located lo within the superior vena cava or right atrium which is also coupled to an extravascular electrode. In another embodiment, a voltage pulse is impressed between an electrode located within the right ventricle and electrodes located within the coronary sinus and the superior vena cava that are also coupled to an extravascular electrode.
    Type: Application
    Filed: February 6, 2006
    Publication date: June 1, 2006
    Inventors: Victor Chen, Stephen Hahn
  • Publication number: 20060063995
    Abstract: An embodiment of the invention includes a device, system and method for determining the characteristics of deep tissue. The novel method includes measuring blood flow rate and oxygenation characteristics of the tissue, and determining oxygen metabolism of the tissue as a function of the measure blood flow rate and measure oxygenation. The blow flow rate characteristics are measured as a function of light fluctuations caused by the tissue, while the oxygenation characteristics are measured as a function of transmission of light through the tissue with respect to the wavelength of light. The tissue may be layered tissue, for example, a portion of a brain. The tissue characteristics may be measured during times of varying levels of exercise intensity.
    Type: Application
    Filed: April 13, 2005
    Publication date: March 23, 2006
    Applicant: Trustees of the University of Pennsylvania
    Inventors: Arjun Yodh, Joel Greenberg, Guoqiang Yu, John Detre, Turgut Durduran, Mark Burnett, Emile Mohler, Harry Quon, Stephen Hahn
  • Publication number: 20050229588
    Abstract: The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter by adjusting the engine air/fuel ratio based on estimates of the actual amount of oxidants stored in the catalyst. The oxidant storage capacity of the catalyst is adjusted by controlling engine spark in response to an estimate of a current amount of oxidants stored in the catalyst and an estimate of the total available oxidant storage capacity of the catalyst. To maintain engine speed in spite of adjustments to the engine spark, the engine air mass is also adjusted.
    Type: Application
    Filed: June 17, 2005
    Publication date: October 20, 2005
    Inventors: Donald James Lewis, Kevin Ronald Carlstrom, Stanley Larue Bower, Stephen Hahn
  • Publication number: 20050204728
    Abstract: The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter by adjusting the engine air/fuel ratio based on estimates of the actual amount of oxidants stored in the catalyst. An available oxidant storage capacity of the catalyst is determined by establishing an oxidant set point location, i.e., a location in the catalyst about which the system controls the oxidant storage. The oxidant set point is established based on the temperatures of the different potential set point locations and the levels of deterioration of the different potential set point locations, as well as the oxidant storage capacity of the emission control device system.
    Type: Application
    Filed: May 11, 2005
    Publication date: September 22, 2005
    Inventors: Donald Lewis, Kevin Carlstrom, Stanley Bower, Stephen Hahn
  • Publication number: 20050198102
    Abstract: A method for dynamically allocating system resources is provided. The method initiates with identifying a goal associated with a corresponding partition of a resource being configured according to a first configuration. The method includes establishing a mathematical function yielding a value associated with the goal. Once a violation of the goal is detected due to a changing workload, alternative configurations are evaluated to meet the goal under the changing workload. Then, a highest ranked one of the alternative configurations is selected and substituted for the first configuration.
    Type: Application
    Filed: May 17, 2004
    Publication date: September 8, 2005
    Applicant: Sun Microsystems, Inc.
    Inventors: Stephen Hahn, Gary Pennington
  • Publication number: 20050070967
    Abstract: A method and system for delivering anti-tachycardia pacing is disclosed. A cardiac rhythm management device, such as an implantable pacemaker having anti-tachycardia pacing capability, delivers anti-tachycardia pacing therapy in accordance with an anti-tachycardia pacing protocol upon detection of a terminable arrhythmia. The anti-tachycardia pacing is delivered as a burst of one or more pacing pulses at a specified coupling interval after a sensed ventricular polarization. By sensing if an evoked potential occurs, the device can determine whether or not the anti-tachycardia pacing burst has captured the ventricle and can adjust the coupling interval and/or other parameters accordingly.
    Type: Application
    Filed: August 9, 2004
    Publication date: March 31, 2005
    Inventors: Qingsheng Zhu, Stephen Hahn, Steven Girouard
  • Patent number: 6605619
    Abstract: The instant invention is directed to the use of a biologically compatible composition, containing an effective amount of a metal-independent nitroxide compound which is preferably represented by the formula wherein R1 is —CH3; R2 is —C2H5, —C3H7, —C4H9, —C5H11, —C6H13, —CH2—CH(CH3)2, —CHCH3C2H5, or —(CH2)7—CH3, or wherein R1 and R2 together form spirocyclopentane, spirocyclohexane, spirocycloheptane, spirocyclooctane, 5-cholestane, or norbornane, R3 is —O. or —OH, or a physiologically acceptable salt thereof, and a pharmaceutically acceptable carrier, as antioxidants capable of protecting cells, tissues, organs, and whole organisms against the deleterious effects of harmful free radical species generated during oxidative stress.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 12, 2003
    Assignee: The United States of America as represented by the Secretary of the Department of Health and Human Services
    Inventors: James B. Mitchell, Amran Samuni, William G. Degraff, Stephen Hahn
  • Patent number: 5462946
    Abstract: The instant invention is directed to the use of a biologically compatible composition, containing an effective amount of a metal independent nitroxide compound which is preferably represented by the formula ##STR1## wherein R.sub.1 is --CH.sub.3 ; R.sub.2 is --C.sub.2 H.sub.5, --C.sub.3 H.sub.7, --C.sub.4 H.sub.9, --C.sub.5 H.sub.11, --C.sub.6 H.sub.13, --CH.sub.2 --CH(CH.sub.3).sub.2, --CHCH.sub.3 C.sub.2 H.sub.5, or --(CH.sub.2).sub.7 --CH.sub.3, or wherein R.sub.1 and R.sub.2 together form spirocyclopentane, spirocyclohexane, spirocycloheptane, spirocyclooctane, 5-cholestane, or norbornane, R.sub.3 is --O. or --OH, or a physiologically acceptable salt thereof, and a pharmaceutically acceptable carrier, as antioxidants capable of protecting cells, tissues, organs, and whole organisms against the deleterious effects of harmful oxygen-derived species generated during oxidative stress.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: October 31, 1995
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: James B. Mitchell, Amram Samuni, William DeGraff, Stephen Hahn