Patents by Inventor Michael Zung
Michael Zung 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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Publication number: 20210177262Abstract: A system for imaging a body lumen includes a controller and a display. The controller is configured to connect to a proximal end of a catheter having an optical fiber extending along the length of an elongate catheter body. The controller is further configured to rotate a distal end of the optical fiber from a location near a proximal end of the elongate catheter body, acquire optical coherence tomography (OCT) images using the optical fiber as the distal end of the optical fiber rotates, and determine a rotational lag of the distal end of the optical fiber. The display is configured to display one or more OCT images corrected for the rotational lag.Type: ApplicationFiled: July 30, 2020Publication date: June 17, 2021Inventors: Maegan K. SPENCER, Christopher B. WHITE, Charles W. MCNALL, Dennis W. JACKSON, Michael ZUNG, Nicholas J. SPINELLI, Benjamin NGO, Evangeline LUMABAS, Kin F. CHAN, John F. BLACK, Michael H. ROSENTHAL, John B. SIMPSON
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Publication number: 20200315654Abstract: An atherectomy catheter includes an elongate flexible catheter body, a cutter near the distal end of the catheter body, a drive shaft connected to the cutter and extending within the catheter body, an imaging element near the distal end of the catheter body.Type: ApplicationFiled: November 12, 2019Publication date: October 8, 2020Inventors: Himanshu N. PATEL, John B. SIMPSON, Anthony J. FERNANDEZ, Richard R. NEWHAUSER, Priyanshu GUPTA, Michael ZUNG, Wendy Ngo LAM, Maegan K. SPENCER, Peter Howard SMITH, Stephen C. DAVIES, Nicholas J. SPINELLI, Charles W. MCNALL, Theodore W. KETAI, Manish KANKARIA, Mark W. ASKEW, Kent C.B. STALKER
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Patent number: 10767949Abstract: Disclosed are various embodiments of safety selector assemblies for firearms. In one embodiment, a safety selector assembly includes a body and a pivoting arm. A portion of the body is configured to be positioned within the frame of the firearm. The pivoting arm is pivotably mounted to the body of the safety selector assembly and is configured to selectively engage a safety selector stop tab that extends from the frame to restrict the body of the safety selector assembly from rotating when the pivoting arm is engaged with the safety selector stop tab.Type: GrantFiled: May 15, 2019Date of Patent: September 8, 2020Assignee: Safe Operator Solutions LLCInventors: Michael Zung, John Mark Cobb
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Patent number: 10729326Abstract: A system for imaging a body lumen includes a controller and a display. The controller is configured to connect to a proximal end of a catheter having an optical fiber extending along the length of an elongate catheter body. The controller is further configured to rotate a distal end of the optical fiber from a location near a proximal end of the elongate catheter body, acquire optical coherence tomography (OCT) images using the optical fiber as the distal end of the optical fiber rotates, and determine a rotational lag of the distal end of the optical fiber. The display is configured to display one or more OCT images corrected for the rotational lag.Type: GrantFiled: July 10, 2013Date of Patent: August 4, 2020Assignee: Avinger, Inc.Inventors: Maegan K. Spencer, Christopher B. White, Charles W. McNall, Dennis W. Jackson, Michael Zung, Nicholas J. Spinelli, Benjamin Ngo, Evangeline Lumabas, Kin F. Chan, John F. Black, Michael H. Rosenthal, John B. Simpson
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Publication number: 20200116448Abstract: Embodiments of safety selectors are disclosed. A safety selector can include a body configured to engage an internal safety mechanisms of a firearm. The safety selector can further include a first arm and a second arm that extend from the body. The first arm and the second arm can be oriented such that a non-zero angle exists between a first axis associated with the first arm and a second axis associated with the second arm.Type: ApplicationFiled: October 14, 2019Publication date: April 16, 2020Inventors: Michael Zung, John Mark Cobb
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Publication number: 20200069253Abstract: Described herein are catheters for use with Optical Coherence Tomography (OCT) that include an optical fiber core having a first refractive index and an interface medium having a second refractive index, where the first and second refractive indexes are mismatched such that receiving electronics configured to receive optical radiation reflected from the reference interface and the target operate in a total noise range that is within 5 dB of the shot noise limit. These OCT catheters may include a silicon die mirror having a reflective coating that is embedded in the interface medium. The optical fiber can be fixed at just the distal end of the catheter, and may be managed within a handle that is attached to the proximal end of the catheter body, and is configured to allow rotation of the both catheter body and the optical fiber relative to the handle.Type: ApplicationFiled: July 9, 2019Publication date: March 5, 2020Inventors: John F. BLACK, Maegan K. SPENCER, Michael ZUNG, Charles W. MCNALL, Evangeline LUMABAS, Michael H. ROSENTHAL, John B. SIMPSON
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Publication number: 20200060718Abstract: Described herein are atherectomy catheters, systems and methods that include longitudinally displaceable drive shafts that drive actuation of one or more cutters at the distal end of the catheter. The catheters described herein may include one or more imaging sensors for imaging before, during or after cutting tissue. In some variations the imaging sensor may be rotated around the perimeter of the catheter independently of the rotation of the cutter. Also describe herein are imaging catheters that may be used without cutters.Type: ApplicationFiled: July 2, 2019Publication date: February 27, 2020Inventors: Himanshu N. PATEL, John B. SIMPSON, Charles W. McNALL, Maegan K. SPENCER, Michael ZUNG, Priyanshu GUPTA, Nicholas J. SPINELLI, Myra L. FABRO, Eduardo SUCGANG, Theodore W. KETAI
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Patent number: 10548478Abstract: An atherectomy catheter includes an elongate flexible catheter body, a cutter near the distal end of the catheter body, a drive shaft connected to the cutter and extending within the catheter body, an imaging element near the distal end of the catheter body and an imaging shaft connected to the imaging element and extending within the catheter body. The cutter and the imaging element are mechanically isolated, and the drive shaft is configured to be axially translated relative to the imaging shaft and the catheter body.Type: GrantFiled: March 15, 2013Date of Patent: February 4, 2020Assignee: Avinger, Inc.Inventors: John B. Simpson, Priyanshu Gupta, Michael Zung, Wendy N. Lam, Maegan K. Spencer, Peter H. Smith, Stephen C. Davies, Nicholas J. Spinelli, Charles W. McNall, Theodore W. Ketai, Manish Kankaria, Mark W. Askew, Kent C. B. Stalker
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Publication number: 20200029801Abstract: A drive assembly for driving an imaging catheter has a rotatable fiber and a rotatable drive shaft. The drive assembly includes a fiber optic rotating junction and a motor configured to rotate the rotatable portion of the fiber optic rotating junction. In some embodiments, the drive assembly includes a sensor configured to detect a rotational position of the fiber optic rotating junction and a processor configured to obtain the detected rotational position and stop the motor only when the fiber optic rotating junction is in a predetermined rotational position. In some embodiments, the motor includes a hollow shaft through which at least a portion of the fiber optic rotating junction extends.Type: ApplicationFiled: April 1, 2019Publication date: January 30, 2020Inventors: Brian Y. TACHIBANA, Charles W. McNALL, Michael ZUNG, Peter Howard SMITH, Brian CHIU, Douglas Joseph Scott BOURNE, Priyanshu GUPTA
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Publication number: 20200025486Abstract: Disclosed are various embodiments of safety selector assemblies for firearms. In one embodiment, a safety selector assembly includes a body and a pivoting arm. A portion of the body is configured to be positioned within the frame of the firearm. The pivoting arm is pivotably mounted to the body of the safety selector assembly and is configured to selectively engage a safety selector stop tab that extends from the frame to restrict the body of the safety selector assembly from rotating when the pivoting arm is engaged with the safety selector stop tab.Type: ApplicationFiled: May 15, 2019Publication date: January 23, 2020Inventors: MIchael Zung, John Mark Cobb
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Publication number: 20190261964Abstract: A device for closing an opening in tissue includes a shaft having a proximal end, a distal end, and a channel disposed between the proximal and distal ends. A pair of pins are disposed within the channel and cooperate with a slidable and axially movable foot. The foot extends distally from the channel with a flexible guidebody extending from a distal foot end of the foot.Type: ApplicationFiled: March 2, 2019Publication date: August 29, 2019Inventors: Michael Zung, Jasper Jackson
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Patent number: 10349974Abstract: Described herein are atherectomy catheters, systems and methods that include longitudinally displaceable drive shafts that drive actuation of one or more cutters at the distal end of the catheter. The catheters described herein may include one or more imaging sensors for imaging before, during or after cutting tissue. In some variations the imaging sensor may be rotated around the perimeter of the catheter independently of the rotation of the cutter. Also describe herein are imaging catheters that may be used without cutters.Type: GrantFiled: May 23, 2016Date of Patent: July 16, 2019Inventors: Himanshu N. Patel, John B. Simpson, Charles W. McNall, Maegan K. Spencer, Michael Zung, Priyanshu Gupta
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Patent number: 10342491Abstract: Described herein are catheters for use with Optical Coherence Tomography (OCT) that include an optical fiber core having a first refractive index and an interface medium having a second refractive index, where the first and second refractive indexes are mismatched such that receiving electronics configured to receive optical radiation reflected from the reference interface and the target operate in a total noise range that is within 5 dB of the shot noise limit. These OCT catheters may include a silicon die mirror having a reflective coating that is embedded in the interface medium. The optical fiber can be fixed at just the distal end of the catheter, and may be managed within a handle that is attached to the proximal end of the catheter body, and is configured to allow rotation of the both catheter body and the optical fiber relative to the handle.Type: GrantFiled: October 13, 2017Date of Patent: July 9, 2019Assignee: Avinger, Inc.Inventors: John F. Black, Maegan K. Spencer, Michael Zung, Charles W. McNall, Evangeline Lumabas, Michael H. Rosenthal, John B. Simpson
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Publication number: 20190110809Abstract: Described herein are atherectomy catheters, systems and methods that include a distal tip region that may be moved laterally so that its long axis is parallel with the long axis of the main catheter body axis. Displacing the distal tip region laterally out of the main catheter body axis exposes an annular blade and opens a passageway for cut tissue to enter a storage region within the catheter. The annular blade may be internally coupled to a drive shaft that rotates the blade, and thus the exposed blade edge may have the same crossing profile (OD) as the rest of the distal end region of the catheter. Also described herein are gear-driven atherectomy devices that may use a cable drive shaft to actuate the annular blade. Both push-to-cut and pull-to-cut variations are described, as are methods for cutting tissue and systems including these atherectomy catheters.Type: ApplicationFiled: August 20, 2018Publication date: April 18, 2019Inventors: Michael H. ROSENTHAL, Michael ZUNG, Nicholas J. SPINELLI, Charles W. McNALL, John B. SIMPSON, John F. BLACK
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Patent number: 10244934Abstract: A drive assembly for driving an imaging catheter has a rotatable fiber and a rotatable drive shaft. The drive assembly includes a fiber optic rotating junction and a motor configured to rotate the rotatable portion of the fiber optic rotating junction. In some embodiments, the drive assembly includes a sensor configured to detect a rotational position of the fiber optic rotating junction and a processor configured to obtain the detected rotational position and stop the motor only when the fiber optic rotating junction is in a predetermined rotational position. In some embodiments, the motor includes a hollow shaft through which at least a portion of the fiber optic rotating junction extends.Type: GrantFiled: May 23, 2016Date of Patent: April 2, 2019Assignee: Avinger, Inc.Inventors: Brian Y. Tachibana, Charles W. McNall, Michael Zung, Peter Howard Smith, Brian Chiu, Douglas Joseph Scott Bourne, Priyanshu Gupta
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Publication number: 20180368688Abstract: An atherectomy catheter includes an elongate flexible catheter body, a cutter near the distal end of the catheter body, a drive shaft connected to the cutter and extending within the catheter body, an imaging element near the distal end of the catheter body and an imaging shaft connected to the imaging element and extending within the catheter body. The cutter and the imaging element are mechanically isolated, and the drive shaft is configured to be axially translated relative to the imaging shaft and the catheter body.Type: ApplicationFiled: March 15, 2013Publication date: December 27, 2018Inventors: John B. Simpson, Priyanshu Gupta, Michael Zung, Wendy N. Lam, Maegan K. Spencer, Peter H. Smith, Stephen C. Davies, Nicholas J. Spinelli, Charles W. McNall, Theodore W. Ketai, Manish Kankaria, Mark W. Askew, Kent C. B. Stalker
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Patent number: 10052125Abstract: Described herein are atherectomy catheters, systems and methods that include a distal tip region that may be moved laterally so that its long axis is parallel with the long axis of the main catheter body axis. Displacing the distal tip region laterally out of the main catheter body axis exposes an annular blade and opens a passageway for cut tissue to enter a storage region within the catheter. The annular blade may be internally coupled to a drive shaft that rotates the blade, and thus the exposed blade edge may have the same crossing profile (OD) as the rest of the distal end region of the catheter. Also described herein are gear-driven atherectomy devices that may use a cable drive shaft to actuate the annular blade. Both push-to-cut and pull-to-cut variations are described, as are methods for cutting tissue and systems including these atherectomy catheters.Type: GrantFiled: November 17, 2016Date of Patent: August 21, 2018Assignee: Avinger, Inc.Inventors: Michael H. Rosenthal, Michael Zung, Nicholas J. Spinelli, Charles W. McNall, John B. Simpson, John F. Black
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Publication number: 20180207417Abstract: A self-aligning system for coupling a catheter to a rotational drive assembly includes a catheter and a drive assembly. The catheter includes an elongate catheter body, a rotatable driveshaft extending within the elongate catheter body, a connector at a proximal end of the elongate catheter body, and a keyed feature extending from an outer diameter of the connector. The drive assembly includes a motor configured to rotate the driveshaft, a receiving tube with a distal opening configured to receive the connector, and a channel on an inner surface of the receiving tube, the channel including two opposing curved walls that are angled towards a substantially straight section. The keyed feature is configured to slide against one of the opposing curved walls and into the substantially straight section to rotationally align the proximal end of the catheter with the drive assembly.Type: ApplicationFiled: July 6, 2016Publication date: July 26, 2018Inventors: Michael ZUNG, Douglas Joseph Scott BOURNE
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Publication number: 20180049700Abstract: Described herein are catheters for use with Optical Coherence Tomography (OCT) that include an optical fiber core having a first refractive index and an interface medium having a second refractive index, where the first and second refractive indexes are mismatched such that receiving electronics configured to receive optical radiation reflected from the reference interface and the target operate in a total noise range that is within 5 dB of the shot noise limit. These OCT catheters may include a silicon die mirror having a reflective coating that is embedded in the interface medium. The optical fiber can be fixed at just the distal end of the catheter, and may be managed within a handle that is attached to the proximal end of the catheter body, and is configured to allow rotation of the both catheter body and the optical fiber relative to the handle.Type: ApplicationFiled: October 13, 2017Publication date: February 22, 2018Inventors: John F. BLACK, Maegan K. SPENCER, Michael ZUNG, Charles W. MCNALL, Evangeline LUMABAS, Michael H. ROSENTHAL, John B. SIMPSON
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Patent number: 9788790Abstract: Described herein are catheters for use with Optical Coherence Tomography (OCT) that include an optical fiber core having a first refractive index and an interface medium having a second refractive index, where the first and second refractive indexes are mismatched such that receiving electronics configured to receive optical radiation reflected from the reference interface and the target operate in a total noise range that is within 5dB of the shot noise limit. These OCT catheters may include a silicon die mirror having a reflective coating that is embedded in the interface medium. The optical fiber can be fixed at just the distal end of the catheter, and may be managed within a handle that is attached to the proximal end of the catheter body, and is configured to allow rotation of both the catheter body and the optical fiber relative to the handle.Type: GrantFiled: May 28, 2010Date of Patent: October 17, 2017Assignee: AVINGER, INC.Inventors: John F. Black, Maegan K. Spencer, Michael Zung, Charles W. McNall, Evangeline Lumabas, Michael H. Rosenthal, John B. Simpson