Patents by Inventor Michael D. Walker
Michael D. Walker 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).
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Patent number: 9084847Abstract: A surgical fluid management system delivers fluid for distending a uterine cavity to allow cutting and extraction of uterine fibroid tissue, polyps and other abnormal uterine tissue. The system comprises a fluid source, fluid deliver lines, one or more pumps, and a filter for re-circulating the distension fluid between the source and the uterine cavity. A controller can monitor fluid retention by the patient.Type: GrantFiled: September 21, 2012Date of Patent: July 21, 2015Assignee: IOGYN, INC.Inventors: Kyle Klein, Aaron Germain, Csaba Truckai, Michael D. Walker
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Publication number: 20150157396Abstract: The tissue cutting device comprises an elongated assembly including both an outer sleeve and an inner sleeve. The outer sleeve has a tissue-receiving window, and the inner sleeve has a distal end which cuts tissue as the inner sleeve is advanced past the window. The tissue is received into a lumen of the inner sleeve, and the inner sleeve lumen is typically enlarged in a proximal direction to reduce the tendency of resected tissue to lodge therein. The tissue displacement member is optionally provided at a distal end of the outer sleeve to further aid in dislodging tissue which becomes captured in a distal end of the inner sleeve of the lumen.Type: ApplicationFiled: February 16, 2015Publication date: June 11, 2015Inventors: Aaron Germain, Kyle Klein, Benedek Orczy-Timko, John H. Shadduck, Michael D. Walker, Csaba Truckai, Balazs Lesko
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Patent number: 8974448Abstract: The tissue cutting device comprises an elongated assembly including both an outer sleeve and an inner sleeve. The outer sleeve has a tissue-receiving window, and the inner sleeve has a distal end which cuts tissue as the inner sleeve is advanced past the window. The tissue is received into a lumen of the inner sleeve, and the inner sleeve lumen is typically enlarged in a proximal direction to reduce the tendency of resected tissue to lodge therein. The tissue displacement member is optionally provided at a distal end of the outer sleeve to further aid in dislodging tissue which becomes captured in a distal end of the inner sleeve of the lumen.Type: GrantFiled: June 22, 2012Date of Patent: March 10, 2015Assignee: Iogyn, Inc.Inventors: Aaron Germain, Kyle Klein, Benedek Orczy-Timko, Michael D. Walker, John H. Shadduck, Csaba Truckai, Balazs Lesko
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Publication number: 20140303551Abstract: A fluid management system for use in a tissue resection procedure includes a controller. An inflow pump is operated by the controller and configured to provide fluid inflow through a flow path to a site in patient's body. An outflow pump is operated by the controller and configured to provide fluid outflow through a flow path from the site in patient's body. A motor driven resecting device may be provided for resecting tissue at the site. The controller is configured to actuate an inflow pump and an outflow pump in response to various signals and various algorithms are provided to provide malfunction warnings and assure safe operation.Type: ApplicationFiled: April 8, 2014Publication date: October 9, 2014Applicant: ARQOS SURGICAL, INC.Inventors: Aaron Germain, Kyle Klein, Michael D. Walker, Robin Bek
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Publication number: 20140221997Abstract: Tissue may be cut and extracted from an interior location in a patient's body using a probe or tool which both effects cutting and causes vaporization of a liquid or other fluid to propel the cut tissue through an extraction lumen of the cutting device. The cutting may be achieved using an electrosurgical electrode assembly, including a first electrode on a cutting member and a second electrode within a cutting probe or tool. Thus, over a first cutting portion, radio frequency current may help cut the tissue and over a second or over transition region, the RF current may initiate vaporization of the fluid or other liquid to propel the tissue from the cutting device.Type: ApplicationFiled: April 9, 2014Publication date: August 7, 2014Applicant: ARQOS Surgical, Inc.Inventors: John H. Shadduck, Aaron Germain, Kyle Klein, Michael D. Walker, Csaba Truckai
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Patent number: 8728066Abstract: Tissue may be cut and extracted from an interior location in a patient's body using a probe or tool which both effects cutting and causes vaporization of a liquid or other fluid to propel the cut tissue through an extraction lumen of the cutting device. The cutting may be achieved using an electrosurgical electrode assembly, including a first electrode on a cutting member and a second electrode within a cutting probe or tool. Thus, over a first cutting portion, radio frequency current may help cut the tissue and over a second or over transition region, the RF current may initiate vaporization of the fluid or other liquid to propel the tissue from the cutting device.Type: GrantFiled: June 5, 2013Date of Patent: May 20, 2014Assignee: Arqos Surgical, Inc.Inventors: John H. Shadduck, Aaron Germain, Kyle Klein, Michael D. Walker, Csaba Truckai
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Publication number: 20140114300Abstract: Tissue is resected and extracted from an interior location in a patient's body using a probe or tool which both effects resection and causes vaporization of a liquid or other fluid to propel the resected tissue through an extraction lumen of the resecting device. Resection is achieved using an electrosurgical electrode assembly including a first electrode on a resecting member and a second electrode within a resection probe or tool. Over a first resecting portion, radio frequency current helps resect the tissue and over a second or over transition region, the RF current initiates vaporization of the fluid or other liquid to propel the tissue from the resection device. In one embodiment, an extending element extends from a housing and into a channel in a resecting member as the resecting member moves toward a distal position.Type: ApplicationFiled: October 14, 2013Publication date: April 24, 2014Applicant: ARQOS Surgical, Inc.Inventors: Benedek Orczy-Timko, Aaron Germain, Michael D. Walker
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Publication number: 20130296847Abstract: Tissue may be cut and extracted from an interior location in a patient's body using a probe or tool which both effects cutting and causes vaporization of a liquid or other fluid to propel the cut tissue through an extraction lumen of the cutting device. The cutting may be achieved using an electrosurgical electrode assembly, including a first electrode on a cutting member and a second electrode within a cutting probe or tool.Type: ApplicationFiled: October 30, 2012Publication date: November 7, 2013Applicant: ARQOS Surgical, Inc.Inventors: Aaron Germain, Kyle Klein, Michael D. Walker, Csaba Truckai, John H. Shadduck
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Publication number: 20130267937Abstract: Tissue may be cut and extracted from an interior location in a patient's body using a probe or tool which both effects cutting and causes vaporization of a liquid or other fluid to propel the cut tissue through an extraction lumen of the cutting device. The cutting may be achieved using an electrosurgical electrode assembly, including a first electrode on a cutting member and a second electrode within a cutting probe or tool. Thus, over a first cutting portion, radio frequency current may help cut the tissue and over a second or over transition region, the RF current may initiate vaporization of the fluid or other liquid to propel the tissue from the cutting device.Type: ApplicationFiled: June 5, 2013Publication date: October 10, 2013Inventors: John H. Shadduck, Aaron Germain, Kyle Klein, Michael D. Walker, Csaba Truckai
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Publication number: 20130231652Abstract: A tissue resection device comprises inner and outer coaxial sleeves. The outer sleeve has a cutting window formed therein, and the inner sleeve has a distal cutting end that can be reciprocated past the cutting window. The sleeves comprise electrodes to provide electrosurgical cutting, and an edge portion of the window includes a dielectric material.Type: ApplicationFiled: August 30, 2012Publication date: September 5, 2013Applicant: ARQOS Surgical, Inc.Inventors: Aaron Germain, Kyle Klein, Michael D. Walker, Benedek Orczy-Timko
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Patent number: 8512326Abstract: Tissue may be cut and extracted from an interior location in a patient's body using a probe or tool which both effects cutting and causes vaporization of a liquid or other fluid to propel the cut tissue through an extraction lumen of the cutting device. The cutting may be achieved using an electrosurgical electrode assembly, including a first electrode on a cutting member and a second electrode within a cutting probe or tool. Thus, over a first cutting portion, radio frequency current may help cut the tissue and over a second or over transition region, the RF current may initiate vaporization of the fluid or other liquid to propel the tissue from the cutting device.Type: GrantFiled: October 20, 2011Date of Patent: August 20, 2013Assignee: ARQOS Surgical, Inc.Inventors: John H. Shadduck, Aaron Germain, Kyle Klein, Michael D. Walker, Csaba Truckai
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Publication number: 20130172870Abstract: A probe for resecting and coagulating tissue comprises an outer sleeve having a tissue cutting window and an inner sleeve having a tissue cutting distal end. And RF cutting region is formed at the distal end of the inner member and an RF coagulation region is formed on an exterior surface of the inner member immediately proximal to the cutting surface. A single power supply providing a single RF energy mode can be connected to both RF applicator regions to simultaneously cut and coagulate tissue.Type: ApplicationFiled: July 2, 2012Publication date: July 4, 2013Applicant: ARQOS Surgical, Inc.Inventors: Aaron Germain, John H. Shadduck, Michael D. Walker, Kyle Klein, Csaba Truckai
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Publication number: 20130172805Abstract: A fluid management system for use with a fluid reservoir includes an inflow pump and an outflow pump. The inflow pump is connectable to a probe for delivering a distention fluid to a body cavity. The outflow pump removes the distention fluid through the same probe, thus establishing a re-circulating volume of distention fluid within the body cavity. The removed fluid is filtered and returned to a fluid reservoir for eventual recycling to the body cavity. A controller adjusts the flow rates of the inflow pump and the outflow pump to maintain a pre-selected fluid pressure or volume within the body cavity.Type: ApplicationFiled: June 27, 2012Publication date: July 4, 2013Applicant: ARQOS Surgical, Inc.Inventors: Csaba Truckai, Aaron Germain, Kyle Klein, John H. Shadduck, Michael D. Walker, Benedeck Orczy-Timko, Balazs Lesko
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Publication number: 20130103021Abstract: A tissue cutting device has an outer sleeve with a distal window and an inner cutting sleeve which moves past the window to cut tissue. The inner cutting sleeve has a lumen which may have a larger proximal diameter than distal diameter. A perimeter of the window may comprise a dielectric material. A distal edge of the inner sleeve may be displaced inwardly.Type: ApplicationFiled: April 9, 2012Publication date: April 25, 2013Applicant: ARQOS Surgical, Inc.Inventors: Aaron Germain, Kyle Klein, Michael D. Walker, Benedek Orczy-Timko, Balazs Lesko
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Publication number: 20130090642Abstract: A surgical tissue cutting and extraction device includes a sleeve having a tissue extraction lumen. One or more jaw members are coupled to the sleeve and configured to pivot or flex relative to the sleeve to capture tissue. The captured tissue may then be resected using radio frequency or other cutting tools on the sleeve.Type: ApplicationFiled: July 3, 2012Publication date: April 11, 2013Applicant: ARQOS Surgical, Inc.Inventors: John H. Shadduck, Aaron Germain, Csaba Truckai, Michael D. Walker, Kyle Klein
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Publication number: 20130079702Abstract: A surgical fluid management system delivers fluid for distending a uterine cavity to allow cutting and extraction of uterine fibroid tissue, polyps and other abnormal uterine tissue. The system comprises a fluid source, fluid deliver lines, one or more pumps, and a filter for re-circulating the distension fluid between the source and the uterine cavity. A controller can monitor fluid retention by the patient.Type: ApplicationFiled: September 21, 2012Publication date: March 28, 2013Applicant: ARQOS Surgical, Inc.Inventors: Kyle Klein, Aaron Germain, Csaba Truckai, Michael D. Walker
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Publication number: 20130046304Abstract: The tissue cutting device comprises an elongated assembly including both an outer sleeve and an inner sleeve. The outer sleeve has a tissue-receiving window, and the inner sleeve has a distal end which cuts tissue as the inner sleeve is advanced past the window. The tissue is received into a lumen of the inner sleeve, and the inner sleeve lumen is typically enlarged in a proximal direction to reduce the tendency of resected tissue to lodge therein. The tissue displacement member is optionally provided at a distal end of the outer sleeve to further aid in dislodging tissue which becomes captured in a distal end of the inner sleeve of the lumen.Type: ApplicationFiled: June 22, 2012Publication date: February 21, 2013Applicant: ARQOS Surgical, Inc.Inventors: Aaron Germain, Kyle Klein, Benedek Orczy-Timko, Michael D. Walker, John H. Shadduck, Csaba Truckai, Balazs Lesko
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Patent number: 8363519Abstract: Method and apparatus for adaptive arrangement of data on storage media, such as in a multi-device storage array across which data are stored. A virtual hot space is formed to store frequently accessed data. The virtual hot space comprises at least one hot data zone which extends across storage media of a plurality of arrayed storage devices over a selected seek range less than an overall radial width of the media. The frequently accessed data are stored to the hot data zone(s) in response to a host level request, such as from a host level operating system (OS) or by a user which identifies the data as frequently accessed data. Alternatively or additionally, access statistics are accumulated and frequently accessed data are migrated to the hot data zone(s) in relation thereto. Lower accessed data sets are further preferably migrated from the hot data zone(s) to another location of the media.Type: GrantFiled: June 30, 2006Date of Patent: January 29, 2013Assignee: Seagate Technology LLCInventors: Clark E. Lubbers, Michael D. Walker, Randy L. Roberson
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Publication number: 20120330292Abstract: Tissue may be cut and extracted from an interior location in a patient's body using a probe or tool which both effects cutting and causes vaporization of a liquid or other fluid to propel the cut tissue through an extraction lumen of the cutting device. The cutting may be achieved using an electrosurgical electrode assembly, including a first electrode on a cutting member and a second electrode within a cutting probe or tool. Thus, over a first cutting portion, radio frequency current may help cut the tissue and over a second or over transition region, the RF current may initiate vaporization of the fluid or other liquid to propel the tissue from the cutting device.Type: ApplicationFiled: October 20, 2011Publication date: December 27, 2012Applicant: ARQOS Surgical, Inc.Inventors: John H. Shadduck, Aaron Germain, Kyle Klein, Michael D. Walker, Csaba Truckai
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Patent number: 8234457Abstract: Method and apparatus for flushing cached writeback data to a storage array. Sets of writeback data are accumulated in a cache memory in an array with a view toward maintaining a substantially uniform distribution of the data across different locations of the storage array. The arrayed sets of data are thereafter transferred from the cache memory to the storage array substantially at a rate at which additional sets of writeback data are provided to the cache memory by a host. Each set of writeback data preferably comprises a plurality of contiguous data blocks, and are preferably written (flushed) to the storage in conjunction with the operation of a separate access command within a selected proximity range of the data with respect to the storage array. A stripe data descriptor (SDD) is preferably maintained for each set of writeback data in the array.Type: GrantFiled: June 30, 2006Date of Patent: July 31, 2012Assignee: Seagate Technology LLCInventors: Clark E. Lubbers, Michael D. Walker, David P. DeCenzo