Patents by Inventor Da-Yu Chang

Da-Yu Chang 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: 8798756
    Abstract: A video processing unit configured to convert a video image to stimulation patterns for stimulating neural tissue in a subject's eye and comprising a power button, wherein the video processing unit is configured to be powered on after a first time interval upon activation of a power button, wherein the video processing unit is configured to be powered off after a second time interval upon activation of a power button.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: August 5, 2014
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Kelly H. McClure, Arup Roy, Richard Agustin Castro, Sumit Yadav, Rongqing Dai, Robert J. Greenberg, Da-Yu Chang, Xiaofan Wu, Scott Loftin, Susan McCord
  • Publication number: 20140188221
    Abstract: A prosthetic heart valve configured to replace a native heart valve and having a support frame configured to be reshaped into an expanded form in order to receive and/or support an expandable prosthetic heart valve therein is disclosed, together with methods of using same. The prosthetic heart valve may be configured to have a generally rigid and/or expansion-resistant configuration when initially implanted to replace a native valve (or other prosthetic heart valve), but to assume a generally expanded form when subjected to an outward force such as that provided by a dilation balloon or other mechanical expander.
    Type: Application
    Filed: December 20, 2013
    Publication date: July 3, 2014
    Inventors: Visith Chung, Da-Yu Chang, Brian S. Conklin, Grace M. Kim, Louis A. Campbell, Donald E. Bobo, Jr., Myron Howanec, David S. Lin, Peng Norasing, Francis M. Tran, Mark Van Nest, Thomas Y. Chien, Harvey H. Chen, Isidro L. Guerrero, Derrick Johnson, Paul A. Schmidt
  • Publication number: 20130345801
    Abstract: A valve sizer for determining an appropriate replacement valve size when performing a heart valve replacement procedure is provided. In one version the valve sizer has a hollow shaft with proximal and distal ends. A movable sizing element couples to the distal end of the shaft and is radially expandable between first, contracted and second, expanded positions. An actuator assembly on a handle includes an actuator coupled to a clutch member via a ball-spring-detent clutch. A rod extends through the shaft and maintains a fixed distance between the handle and a distal hub in the sizing element. Movement of the actuator causes axial movement of the shaft, thereby causing radial expansion of sizing petals relative to the hub. The clutch slips when a predetermined reaction force from the surrounding valve annulus is met by the petals.
    Type: Application
    Filed: August 27, 2013
    Publication date: December 26, 2013
    Applicant: Edwards Lifesciences Corporation
    Inventors: Brian S. Conklin, Da-Yu Chang
  • Publication number: 20130331908
    Abstract: The present disclosure describes a video device suitable to be word on the head of a user in the form of glasses. The glasses frame supports a camera, active electronics and a battery.
    Type: Application
    Filed: August 8, 2013
    Publication date: December 12, 2013
    Inventors: Robert J. Greenberg, Mark S. Humayun, Rajat N. Agrawel, Kevin Wilkin, James S. Little, Da-Yu Chang
  • Publication number: 20130268039
    Abstract: The present invention is an improved hermetic package for implantation in the human body. The implantable device of the present invention includes an eclectically non-conductive bass including electrically conductive vias through the substrate. A circuit is flip-chip bonded to a subset of the vias. A second circuit is wire bonded to another subset of the vias. Finally, a cover is bonded to the substrate such that the cover, substrate and vias form a hermetic package.
    Type: Application
    Filed: May 28, 2013
    Publication date: October 10, 2013
    Inventors: Robert J. Greenberg, Jerry Ok, Jordan Matthew Neysmith, Kevin Wilkin, Neil Hamilton Talbot, Da-Yu Chang
  • Publication number: 20130261717
    Abstract: The present invention is an improved package and configuration for an implantable retinal prosthesis. The retinal prosthesis of the present invention includes an electrode array suitable to be mounted in close proximity to a retina, an electronics package and inductive receiving coil mounted next to each other on a strap surrounding the sclera so that the height above the sclera of the prosthesis is minimized.
    Type: Application
    Filed: May 23, 2013
    Publication date: October 3, 2013
    Inventors: Robert J. Greenberg, Jerry Ok, Jordan Matthew Neysmith, Kevin Wilkin, Neil Hamilton Talbot, Da-Yu Chang
  • Patent number: 8538540
    Abstract: A retinal prosthesis with an inductive coil mounted to the side of the eye by using a strap around the eye. This allows for close coupling to an external coil and movement of the entire implanted portion with movement of the eye ball.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: September 17, 2013
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Robert Greenberg, Mark Humayan, James Little, Kevin Wilkin, Da-Yu Chang, Rajat Agrawal
  • Patent number: 8532776
    Abstract: The present invention is an improved hermetic package for implantation in the human body. The implantable device of the present invention includes an eclectically non-conductive bass including electrically conductive vias through the substrate. A circuit is flip-chip bonded to a subset of the vias. A second circuit is wire bonded to another subset of the vias. Finally, a cover is bonded to the substrate such that the cover, substrate and vias form a hermetic package.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: September 10, 2013
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Robert J Greenberg, Jerry Ok, Jordan Matthew Neysmith, Kevin Wilkin, Neil Hamilton Talbot, Da-Yu Chang
  • Patent number: 8527057
    Abstract: The present invention is an improved package and configuration for an implantable retinal prosthesis. The retinal prosthesis of the present invention includes an electrode array suitable to be mounted in close proximity to a retina, an electronics package and inductive receiving coil mounted next to each other on a strap surrounding the sclera so that the height above the sclera of the prosthesis is minimized.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: September 3, 2013
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Robert J. Greenberg, Jerry Ok, Jordan Neysmith, Kevin Wilkins, Neil Hamilton Talbot, Da-Yu Chang
  • Patent number: 8498713
    Abstract: The present invention is a visor for retinal stimulation of visually impaired subjects. The visor comprises a frame, an external coil, a camera and a mounting system. A connector allows the external coil to be positioned along a first direction. A sliding device allows the external coil to be positioned along a second direction. Positioning of the visor on a subject's nose allows the external coil to be positioned along a third direction. Positioning of the external coil along the first, second or third direction is useful to maximize coupling RF coupling between the external coil and an internal coil implanted on a subject wearing the visor.
    Type: Grant
    Filed: October 28, 2007
    Date of Patent: July 30, 2013
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Kelly H. McClure, Richard Agustin Castro, Sanjay Gaikwad, Da-Yu Chang, Scott M. Loftin, Rongqing Dai, Robert J. Greenberg
  • Patent number: 8473048
    Abstract: The present invention is an improved hermetic package for implantation in the human body. The implantable device of the present invention includes an eclectically non-conductive bass including electrically conductive vias through the substrate. A circuit is flip-chip bonded to a subset of the vias. A second circuit is wire bonded to another subset of the vias. Finally, a cover is bonded to the substrate such that the cover, substrate and vias form a hermetic package.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: June 25, 2013
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Robert J. Greenberg, Jerry Ok, Jordan Neysmith, Kevin Wilkin, Neil Hamilton Talbot, Da-Yu Chang
  • Publication number: 20120271317
    Abstract: The present invention is a surgical tool for implanting an electrode array and its connected cable within an orbital socket. The insertion tool is used to aid the surgeon in pulling the electrode wire and array through the scull, four-rectus muscles of the eye, and the sclera. The insertion tool consists of a medical grade ABS material that is commonly used in various medical products.
    Type: Application
    Filed: June 28, 2012
    Publication date: October 25, 2012
    Inventors: Robert Greenberg, Da-Yu Chang
  • Publication number: 20120253457
    Abstract: Compressible heart valve annulus sizing templates suitable for minimally-invasive or otherwise reduced accessibility surgeries. The sizing templates may be folded, rolled, or otherwise compressed into a reduced configuration for passage through an access tube or other such access channel. Once expelled from the access tube the sizing templates expand to their original shape for use in sizing the annulus. The templates may be formed of an elastomeric polymer material such as silicone, a highly elastic metal such as NITINOL, or both. Grasping tabs or connectors for handles permit manipulation from outside the body. A NITINOL wireform may be compressed for passage through an access tube and expelled from the distal end thereof into a cloth cover to assume a sizer shape.
    Type: Application
    Filed: March 23, 2012
    Publication date: October 4, 2012
    Applicant: Edwards Lifesciences Corporation
    Inventors: Matthew Winston, Da-Yu Chang, Louis A. Campbell, James A. Davidson
  • Patent number: 8231637
    Abstract: The present invention is a surgical tool for implanting an electrode array and its connected cable within an orbital socket. The insertion tool is used to aid the surgeon in pulling the electrode wire and array through the scull, four-rectus muscles of the eye, and the sclera. The insertion tool consists of a medical grade ABS material that is commonly used in various medical products.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: July 31, 2012
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Robert Greenberg, Da-Yu Chang
  • Patent number: 8195302
    Abstract: A video processing unit configured to convert a video image to stimulation patterns for stimulating neural tissue in a subject's eye, the video processing unit comprising a video processor for converting a video image to a digital video stream; a memory for storing the digital video stream; and a video preprocessor data interface for forming stimulation patterns based on the stored digital video stream.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: June 5, 2012
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Kelly H. McClure, Arup Roy, Richard Agustin Castro, Sumit Yadav, Rongqing Dai, Robert J. Greenberg, Da-Yu Chang, Xiaofan Wu, Scott Loftin, Susan McCord
  • Patent number: 8195303
    Abstract: A visual prosthesis apparatus comprising: a video capture device for capturing a video image; a video processing unit associated with the video capture device, the video processing unit configured to convert the video image to stimulation patterns; and a retinal stimulation system configured to stimulate neural tissue in a subject's eye based on the stimulation patterns, wherein the video processing unit is configured to be powered on after a first time interval upon activation of a power button, wherein the video processing unit is configured to be powered off after a second time interval upon activation of a power button.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: June 5, 2012
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Kelly H. McClure, Arup Roy, Richard Agustin Castro, Sumit Yadav, Rongqing Dai, Robert J. Greenberg, Da-Yu Chang, Xiaofan Wu, Scott Loftin, Susan McCord
  • Publication number: 20120071970
    Abstract: A prosthetic tricuspid remodeling annuloplasty ring for use in tricuspid valve repairs to provide annular support after reconstructive valve surgery. The ring maintains an optimal annular dimension to prevent excessive dilatation of the natural valve annulus while adapting to the dynamic motion of the tricuspid annulus during the cardiac cycle. An exemplary ring features a waveform contour and may be constructed of a titanium core having a varying cross-section for selective flexibility for good Z-axis or out-of plane movement. The “waveform” contour and selective flexibility of the different segments of this ring are designed to adapt to the complex motion of the annulus. This reduces the stress on the anatomical structures and therefore minimizes the risk of arrhythmia and ring dehiscence.
    Type: Application
    Filed: August 30, 2011
    Publication date: March 22, 2012
    Applicant: EDWARDS LIFESCIENCES CORPORATION
    Inventors: Alain F. Carpentier, William C. Brunnett, Louis A. Campbell, Da-Yu Chang, Steven Ford, John F. Migliazza, Anand Rao
  • Publication number: 20110319964
    Abstract: The invention is a retinal prosthesis with an inductive coil mounted to the side of the eye by means of a strap around the eye. This allows for close coupling to an external coil and movement of the entire implanted portion with movement of the eye ball.
    Type: Application
    Filed: September 7, 2011
    Publication date: December 29, 2011
    Inventors: Robert Greenberg, Mark Humayan, James Little, Kevin Wilkin, Da-Yu Chang, Rajat Agrawal
  • Patent number: 8036751
    Abstract: The invention is a retinal prosthesis with an inductive coil mounted to the side of the eye by means of a strap around the eye. This allows for close coupling to an external coil and movement of the entire implanted portion with movement of the eye ball.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: October 11, 2011
    Assignee: Second Sight Medical Producers, Inc.
    Inventors: Robert Greenberg, Mark Humayan, James Little, Kevin Wilkin, Da-Yu Chang, Rajat Agrawal
  • Publication number: 20110118807
    Abstract: The present invention is an improved package and configuration for an implantable retinal prosthesis. The retinal prosthesis of the present invention includes an electrode array suitable to be mounted in close proximity to a retina, an electronics package and inductive receiving coil mounted next to each other on a strap surrounding the sclera so that the height above the sclera of the prosthesis is minimized.
    Type: Application
    Filed: December 22, 2010
    Publication date: May 19, 2011
    Inventors: Robert J. Greenberg, Jerry Ok, Jordan Neysmith, Kevin Wilkins, Neil Hamilton Talbot, Da-Yu Chang