Patents by Inventor Paul K. Hsei

Paul K. Hsei 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: 8133247
    Abstract: A multi-part tool assembly for harvesting and implanting follicular units, comprising an outer cannula having an open, tissue-piercing distal end, and an inner cannula coaxially positioned in a lumen of the first cannula, the second cannula having an open, tissue-coring distal end sized to engage and retain single hair follicular units. An obturator may be positioned in the lumen of the second cannula, wherein at least one of the first cannula, second cannula, and obturator are movable relative to the other ones.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: March 13, 2012
    Assignee: Restoration Robotics, Inc.
    Inventors: Mohan Bodduluri, Paul K. Hsei
  • Publication number: 20100030234
    Abstract: A multi-part tool assembly for harvesting and implanting follicular units, comprising an outer cannula having an open, tissue-piercing distal end, and an inner cannula coaxially positioned in a lumen of the first cannula, the second cannula having an open, tissue-coring distal end sized to engage and retain single hair follicular units. An obturator may be positioned in the lumen of the second cannula, wherein at least one of the first cannula, second cannula, and obturator are movable relative to the other ones.
    Type: Application
    Filed: October 12, 2009
    Publication date: February 4, 2010
    Inventors: Mohan Bodduluri, Paul K. Hsei
  • Patent number: 7621934
    Abstract: A method of transplanting a hair follicular units includes aligning a longitudinal axis of a harvesting cannula of a tool assembly with a longitudinal axis of a selected follicular unit, advancing the harvesting cannula relative to the body surface so that a tissue coring distal end of the harvesting cannula penetrates the body surface surrounding the selected follicular unit to a depth sufficient to substantially encapsulate the follicular unit, withdrawing the harvesting cannula distal end from the body surface with the follicular unit retained in an interior lumen of the harvesting cannula, advancing an implanting cannula of the tool assembly over the harvesting cannula relative to the body surface so that a tissue piercing distal end of the implanting cannula punctures the body surface and forms an implantation cavity therein, and displacing the follicular unit from the harvesting cannula lumen into the implantation cavity.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: November 24, 2009
    Assignee: Restoration Robotics, Inc
    Inventors: Mohan Bodduluri, Paul K. Hsei
  • Patent number: 7621933
    Abstract: A multi-part tool assembly for harvesting and implanting follicular units, comprising an outer cannula having an open, tissue-piercing distal end, and an inner cannula coaxially positioned in a lumen of the first cannula, the second cannula having an open, tissue-coring distal end sized to engage and retain single hair follicular units. An obturator may be positioned in the lumen of the second cannula, wherein at least one of the first cannula, second cannula, and obturator are movable relative to the other ones.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: November 24, 2009
    Assignee: Restoration Robotics, Inc.
    Inventors: Mohan Bodduluri, Paul K. Hsei
  • Patent number: 7311673
    Abstract: A biopsy device comprises a biopsy instrument, suitable for collecting at least one tissue sample from a body lumen, such as a mammary duct, and a cutter introducer sized for receiving the biopsy instrument and introducing the biopsy instrument into a mammary duct to retrieve a tissue sample therefrom.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: December 25, 2007
    Assignee: Acueity, Inc.
    Inventors: Richard L. Mueller, Jr., Paul K. Hsei
  • Patent number: 7192430
    Abstract: Apparatuses and methods for removing solid tissue from beneath a tissue surface are described. The methods rely on positioning an energy conductive element at a target site beneath the tissue surface and energizing the element so that it can vaporize tissue. The element is then moved in a pattern which provides the desired tissue removal geometry, such as spherical, ovoid, or cylindrical. Usually, the shaft is moved, typically rotated or reciprocated, and the energy conductive element is moved relative to the shaft, typically by pivoting a rigid element or bowing a flexible element.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: March 20, 2007
    Assignee: Cytyc Corporation
    Inventors: Csaba Truckai, Russel M. Sampson, Paul K. Hsei
  • Publication number: 20040215103
    Abstract: A biopsy device comprises a biopsy instrument, suitable for collecting at least one tissue sample from a body lumen, such as a mammary duct, and a cutter introducer sized for receiving the biopsy instrument and introducing the biopsy instrument into a mammary duct to retrieve a tissue sample therefrom.
    Type: Application
    Filed: April 24, 2003
    Publication date: October 28, 2004
    Inventors: Richard L. Mueller, Paul K. Hsei
  • Publication number: 20040054368
    Abstract: Apparatuses and methods for removing solid tissue from beneath a tissue surface are described. The methods rely on positioning an energy conductive element at a target site beneath the tissue surface and energizing the element so that it can vaporize tissue. The element is then moved in a pattern which provides the desired tissue removal geometry, such as spherical, ovoid, or cylindrical. Usually, the shaft is moved, typically rotated or reciprocated, and the energy conductive element is moved relative to the shaft, typically by pivoting a rigid element or bowing a flexible element.
    Type: Application
    Filed: August 5, 2003
    Publication date: March 18, 2004
    Applicant: NOVACEPT
    Inventors: Csaba Truckai, Russel M. Sampson, Paul K. Hsei
  • Patent number: 6663626
    Abstract: Apparatuses and methods for removing solid tissue from beneath a tissue surface are described. The methods rely on positioning an energy conductive element at a target site beneath the tissue surface and energizing the element so that it can vaporize tissue. The element is then moved in a pattern which provides the desired tissue removal geometry, such as spherical, ovoid, or cylindrical. Usually, the shaft is moved, typically rotated or reciprocated, and the energy conductive element is moved relative to the shaft, typically by pivoting a rigid element or bowing a flexible element.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: December 16, 2003
    Assignee: Novacept
    Inventors: Csaba Truckai, Russel M. Sampson, Paul K. Hsei
  • Publication number: 20020072745
    Abstract: Apparatuses and methods for removing solid tissue from beneath a tissue surface are described. The methods rely on positioning an energy conductive element at a target site beneath the tissue surface and energizing the element so that it can vaporize tissue. The element is then moved in a pattern which provides the desired tissue removal geometry, such as spherical, ovoid, or cylindrical. Usually, the shaft is moved, typically rotated or reciprocated, and the energy conductive element is moved relative to the shaft, typically by pivoting a rigid element or bowing a flexible element.
    Type: Application
    Filed: August 14, 2001
    Publication date: June 13, 2002
    Applicant: NOVACEPT
    Inventors: Csaba Truckai, Russel M. Sampson, Paul K. Hsei
  • Patent number: 6296639
    Abstract: Apparatuses and methods for removing solid tissue from beneath a tissue surface are described. The methods rely on positioning an energy conductive element at a target site beneath the tissue surface and energizing the element so that it can vaporize tissue. The element is then moved in a pattern which provides the desired tissue removal geometry, such as spherical, ovoid, or cylindrical. Usually, the shaft is moved, typically rotated or reciprocated, and the energy conductive element is moved relative to the shaft, typically by pivoting a rigid element or bowing a flexible element.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: October 2, 2001
    Assignee: Novacept
    Inventors: Csaba Truckai, Russel M. Sampson, Paul K. Hsei
  • Patent number: 6159160
    Abstract: Improved systems and methods are used for controlled infusion of fluid into a body cavity. In particular, the improved system allows a user to accurately control pressure created in a body cavity over a broad range of fluid flow rates required in various medical procedures. In one embodiment, the system comprises a pump having a conduit which defines a fluid flow path from the pump. Typically, a surgical instrument such as a resectoscope is coupled to the conduit to direct the fluid into the body cavity. The system controls pressure in the body cavity by using a first sensor to measure pump output and a second sensor to measure body cavity pressure. Preferably, the second sensor measures the actual pressure in the body cavity to correct for any pressure losses that may occur during fluid delivery from the pump.
    Type: Grant
    Filed: September 3, 1998
    Date of Patent: December 12, 2000
    Assignee: Ethicon, Inc.
    Inventors: Paul K. Hsei, Christopher R. Clare, Donald L. Alden
  • Patent number: 6092430
    Abstract: A controller for use in a system employing selective permeable membrane technology to maintain a controlled atmosphere within a refrigerated container. The controller is electrically interfaced to an oxygen and carbon dioxide sensing device which is disposed within the container and capable of withstanding severe enviromental conditions to measure the levels of oxygen and carbon dioxide within the container. The controller maintains present levels of oxygen and carbon dioxide within the container and is adapted to calibrate the carbon dioxide and oxygen sensing devices as well as check for proper operation of the sensing devices and default to safety conditions when a failure is detected. The controller is further adapted to control the atmosphere maintenance system in a manner adapted not to increase the peak power requirements of the system.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: July 25, 2000
    Assignee: Prolong Systems, Inc.
    Inventors: Max D. Liston, Todd I. Harrison, Paul K. Hsei
  • Patent number: 5826981
    Abstract: A static mixer for mixing substances under either laminar flow or turbulent flow conditions, or for mixing substances having a combination of laminar and turbulent flow conditions. The static mixer includes a first conduit operatively connected to a series of two or more mixing segments. The mixing segments include one or more splitting components for dividing the fluid stream into two or more flow streams, two or more flow branches wherein each of the flow branches receives one of the flow streams and wherein each of the flow branches operatively changes the cross-sectional shapes of their respective flow streams in preparation for layering and stacking the flow streams to each other, and a second conduit for receiving and stacking the two or more flow streams creating a layered unified fluid stream.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: October 27, 1998
    Assignee: Nova Biomedical Corporation
    Inventors: James E. Fowler, Paul K. Hsei
  • Patent number: 5826977
    Abstract: A method of mixing substances under either laminar flow or turbulent flow conditions, or substances having a combination of laminar flow conditions. The method includes combining two or more initial fluidic substances into a combined fluid stream, dividing the combined fluid stream into two or more separate fluid streams, changing the shape of each of the two or more separate fluid streams in preparation for layering the two or more separate fluid streams together into a subsequent combined fluid stream such that each subsequent combined fluid stream has the same cross-sectional shape as the initial combined fluid stream and such that the cross-sectional area of the fluid stream is constant, and repeating the dividing, shaping and layering of the subsequent combined fluid stream at least one or more times.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: October 27, 1998
    Assignee: Nova Biomedical Corporation
    Inventors: James E. Fowler, Paul K. Hsei
  • Patent number: 5801317
    Abstract: A controller for use in a system employing selective permeable membrane technology to maintain a controlled atmosphere within a refrigerated container. The controller is electrically interfaced to an oxygen and carbon dioxide sensing device which is disposed within the container and capable of withstanding severe environmental conditions to measure the levels of oxygen and carbon dioxide within the container. The controller maintains preset levels of oxygen and carbon dioxide within the container and is adapted to calibrate the carbon dioxide and oxygen sensing devices as well as check for proper operation of the sensing devices and default to safety conditions when a failure is detected. The controller is further adapted to control the atmosphere maintenance system in a manner adapted not to increase the peak power requirements of the system.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: September 1, 1998
    Inventors: Max D. Liston, Todd I. Harrison, Paul K. Hsei
  • Patent number: 5623105
    Abstract: A controller for use in a system employing selective permeable membrane technology to maintain a controlled atmosphere within a refrigerated container. The controller is electrically interfaced to an oxygen and carbon dioxide sensing device which is disposed within the container and capable of withstanding severe environmental conditions to measure the levels of oxygen and carbon dioxide within the container. The controller maintains preset levels of oxygen and carbon dioxide within the container and is adapted to calibrate the carbon dioxide and oxygen sensing devices as well as check for proper operation of the sensing devices and default to safety conditions when a failure is detected. The controller is further adapted to control the atmosphere maintenance system in a manner adapted not to increase the peak power requirements of the system.
    Type: Grant
    Filed: January 19, 1995
    Date of Patent: April 22, 1997
    Assignee: Prolong Systems, Inc.
    Inventors: Max D. Liston, Todd I. Harrison, Paul K. Hsei
  • Patent number: 5357113
    Abstract: A pneumatic detector, non-dispersive infrared analyzer employing detector cell chambers in optical series. The invention having an auxiliary chamber communicating with the front chamber to increase the rear chamber's signal so as to balance the signals from the front and rear chambers. The use of xenon as a diluent gas in the detector chambers in combination with a mass flow detector to improve the sensitivity. The use of an improved synchronous detection method employing a voltage-to-frequency circuit to convert the detector signal to a synchronous high resolution digital signal. The use of an improved source electrically pulsed having low thermal mass and a large radiating area.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: October 18, 1994
    Assignee: Liston Scientific Corp.
    Inventors: Max D. Liston, Todd I. Harrison, Paul K. Hsei, Wayne F. Blackburn
  • Patent number: 5277873
    Abstract: A sample preparation device for precisely measuring a sample volume, mixing the sample with a reagent and then separating out any resulting precipitant from the sample. In using the device, the sample is nonquantitatively dispensed by the user and is volumetrically delivered by the device using a positive displacement method. No vortexing or shaking is required and the sample and reagent are precisely and reproducibly mixed automatically.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: January 11, 1994
    Inventor: Paul K. Hsei
  • Patent number: 4946651
    Abstract: A modular multi-channel automated medical analyzer device is disclosed, characterized by use of an ion selective electrode and/or enzymatic electrode/wash cell system which permits rapid analysis of various substances of interest contained within undiluted body fluids such as whole blood, serum and/or plasma. The ion selective electrode and/or the enzymatic electrode are disposed upon a probe which automatically axially reciprocates downwardly in a simple manipulative motion between an open-ended reference wash cell and a sample cup bearing the body fluid specimen to be analyzed. The wash cell includes an inlet port and one or more outlet ports through which is circulated an aqueous solution bearing a known concentration of the substance to be measured to provide a reference calibration medium as well as a probe washing medium.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: August 7, 1990
    Assignee: SmithKline Diagnostics, Inc.
    Inventors: Max D. Liston, Paul K. Hsei, David G. Dickinson, George M. Daffern, James G. Fetty