Patents by Inventor Stephen Chan

Stephen Chan 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: 11367188
    Abstract: A GAN is trained to process input images and produce a synthetic dental image. The GAN further takes masks as inputs with each image, the masks labeling pixels of the image corresponding to dental features (anatomy and/or treatments). The GAN includes an encoder-decoder with normalization between stages of the decoder according to the masks. A synthetic image and an unpaired dental image is evaluated by a first discriminator of the GAN to obtain a realism estimate. The synthetic image and an unpaired dental image may be processed using a pretrained dental encoder to obtain a perceptual loss. The GAN is trained with the realism estimate and perceptual loss. Utilization may include modifying a mask for an input image to include or exclude a shape of a feature such that the synthetic image includes or excludes a dental feature.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: June 21, 2022
    Assignee: Retrace Labs
    Inventors: Vasant Kearney, Hamid Hekmatian, Stephen Chan, Ali Sadat
  • Patent number: 11348237
    Abstract: Dental images are processed according to a first machine learning model to determine teeth labels. The teeth labels and image are concatenated and processed using a second machine learning model to label anatomy including CEJ, JE, GM, and Bone. The anatomy labels, teeth labels, and image are concatenated and processed using a third machine learning model to obtain feature measurements, such as pocket depth and clinical attachment level. The feature measurements, anatomy labels, teeth labels, and image may be concatenated and input to a fourth machine learning model to obtain a diagnosis for a periodontal condition. Feature measurements and/or the diagnosis may be processed according to a diagnosis hierarchy to determine whether a treatment is appropriate. Machine learning models may further be used to reorient, decontaminate, and restore the image prior to processing. Machine learning models may be embodied as CNN, GAN, and cyclic GAN.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: May 31, 2022
    Assignee: Retrace Labs
    Inventors: Vasant Kearney, Ali Sadat, Stephen Chan, Hamid Hakmatian, Yash Patel
  • Publication number: 20210358604
    Abstract: An interface enables a user to select a block type, place an instance of that block type in a schematic and connect the instance to other instances. Each block type defines processing of dental data, such as dental images according to any of a plurality of modalities and defines logic, such as if statements, to determine an output (positive/negative) for instances of that block type. Logic may include Boolean expressions relating to results of the inf statements. The logic may operate with respect to data derived from patient data using a machine learning model trained to measure dental anatomy, measure dental pathologies, or diagnose dental conditions. A workflow may be created with instances to determine the appropriateness of a dental treatment.
    Type: Application
    Filed: March 26, 2021
    Publication date: November 18, 2021
    Inventors: Vasant Kearney, Stephen Chan, Jiahong Weng, Hamid Hekmatian, Wenxiang Deng, Ashwini Jha, Ali Sadat
  • Publication number: 20210341482
    Abstract: This invention relates to a method for determining if a cancer of a subject is expected to respond to chemotherapy.
    Type: Application
    Filed: May 14, 2019
    Publication date: November 4, 2021
    Inventors: Tarek ABDEL-FATAH, Stephen CHAN
  • Publication number: 20210118129
    Abstract: A GAN is trained to process input images and produce a synthetic dental image. The GAN further takes masks as inputs with each image, the masks labeling pixels of the image corresponding to dental features (anatomy and/or treatments). The GAN includes an encoder-decoder with normalization between stages of the decoder according to the masks. A synthetic image and an unpaired dental image is evaluated by a first discriminator of the GAN to obtain a realism estimate. The synthetic image and an unpaired dental image may be processed using a pretrained dental encoder to obtain a perceptual loss. The GAN is trained with the realism estimate and perceptual loss. Utilization may include modifying a mask for an input image to include or exclude a shape of a feature such that the synthetic image includes or excludes a dental feature.
    Type: Application
    Filed: September 25, 2020
    Publication date: April 22, 2021
    Inventors: Vasant Kearney, Hamid Hekmatian, Stephen Chan, Ali Sadat
  • Publication number: 20200364860
    Abstract: Dental images are processed according to a first machine learning model to determine teeth labels. The teeth labels and image are concatenated and processed using a second machine learning model to label anatomy including CEJ, JE, GM, and Bone. The anatomy labels, teeth labels, and image are concatenated and processed using a third machine learning model to obtain feature measurements, such as pocket depth and clinical attachment level. The feature measurements, anatomy labels, teeth labels, and image may be concatenated and input to a fourth machine learning model to obtain a diagnosis for a periodontal condition. Feature measurements and/or the diagnosis may be processed according to a diagnosis hierarchy to determine whether a treatment is appropriate. Machine learning models may further be used to reorient, decontaminate, and restore the image prior to processing. Machine learning models may be embodied as CNN, GAN, and cyclic GAN.
    Type: Application
    Filed: May 15, 2020
    Publication date: November 19, 2020
    Inventors: Vasant Kearney, Ali Sadat, Stephen Chan, Hamid Hakmatian, Yash Patel
  • Patent number: 10745941
    Abstract: A barrier latch assembly having a housing including a first locking element, a second locking element, a trigger and a swing plate. The swing plate is coupled to the trigger and to the first and second locking elements. When the trigger is depressed, the swing plate pivots from an unlock position to a lock position over a rear side of the first and second locking element thereby blocking and preventing the first and second locking elements from being depressed inward.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: August 18, 2020
    Assignee: Munchkin, Inc.
    Inventors: Ruth Hsin-Ju Fang, Thomas Birkert, Stephen Kong, Stephen Chan
  • Publication number: 20170073998
    Abstract: A barrier latch assembly having a housing including a first locking element, a second locking element, a trigger and a swing plate. The swing plate is coupled to the trigger and to the first and second locking elements. When the trigger is depressed, the swing plate pivots from an unlock position to a lock position over a rear side of the first and second locking element thereby blocking and preventing the first and second locking elements from being depressed inward.
    Type: Application
    Filed: July 18, 2016
    Publication date: March 16, 2017
    Inventors: Ruth Hsin-Ju FANG, Thomas Birkert, Stephen Kong, Stephen Chan
  • Publication number: 20160234582
    Abstract: The present invention is related to redundancy within a passive optical network and may include a first optical line terminal (OLT), a second optical line terminal, a first optical networking terminal (ONT) including an optical port and at least one Ethernet port; and a first two-to-many passive optical splitter. In operation, the first ONT may be registered with the first OLT and the second OLT may have the transmit function of the first optical port turned off. The receive function of the first optical port on the second OLT may be turned on and may be listening to the communication between the first OLT and the first ONT. When the second OLT no longer receives a signal indicating that the first OLT is still registered with the first ONT, the second OLT may turn on the receive function of the first optical port and registers with the first ONT.
    Type: Application
    Filed: February 10, 2016
    Publication date: August 11, 2016
    Inventors: Daniel Ronald, Byron Thom, Stephen Chan, Nine Siong Lam Hang, Pook-Ping Yao
  • Patent number: 8751459
    Abstract: Website and newsletter operators may only have users' email addresses but not their person names. It can be beneficial for such operators to derive additional information about the email address owners so they can improve their services. However, there is no easy way to retrieve owners' information based on only email addresses. The present disclosure provides information such as the owners' names, professional profiles and aggregated statistics with only a list of email addresses as the input.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: June 10, 2014
    Assignee: App Tsunami, Inc.
    Inventors: Stephen Chan, Edbert Chan
  • Publication number: 20130318098
    Abstract: Website and newsletter operators may only have users' email addresses but not their person names. It can be beneficial for such operators to derive additional information about the email address owners so they can improve their services. However, there is no easy way to retrieve owners' information based on only email addresses. The present disclosure provides information such as the owners' names, professional profiles and aggregated statistics with only a list of email addresses as the input.
    Type: Application
    Filed: May 24, 2012
    Publication date: November 28, 2013
    Inventors: Stephen Chan, Edbert Chan
  • Publication number: 20130268420
    Abstract: Methods and systems for real-time, interactive solutioning and visualization of working capital for an enterprise employ a processor coupled to memory and other computer hardware and software components for storing fixed data consisting at least in part of information regarding financial institution products and information regarding governmental regulations; storing variable data consisting at least in part of information regarding operations of the enterprise; receiving variable data interactively consisting at least in part of information regarding enterprise preferences; and generating at least one recommendation for a proposed structure for the enterprise based at least in part on the fixed data and the variable data.
    Type: Application
    Filed: April 5, 2013
    Publication date: October 10, 2013
    Applicant: Citigroup Technology, Inc.
    Inventors: Shi Wei Ong, E May Neoh, Stephen Chan, Keng Mun Lee, Kwan Hoon Park, Andrew Kehoe, Alfonso Martin, Anthony Nappi, Geraldine Yip, Dianne Challenor, Sudeep Yadav, Gourang Shah, Philippe Jaccard, Jason Batman, Mike David, Danielle Johnson, Peter Williams, Elizabeth Towler, Gary Greenwald, Yogesh Ajinkya, Sabiha Kazi
  • Patent number: 7803555
    Abstract: Methods and compositions are provided for at least slowing the progression of a filovirus mediated disease condition in a host. In the subject methods, an effective amount of an agent that at least reduces the amount of folate receptor mediated filovirus cell entry is administered to the host. The subject methods find use in both the prevention and treatment of filovirus associated disease conditions, including Marburg and Ebola-Zaire virus mediated disease conditions.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: September 28, 2010
    Assignee: The J. David Gladstone Institutes
    Inventors: Mark A. Goldsmith, Stephen Chan
  • Patent number: 7673194
    Abstract: An apparatus for generating a function activation signal to activate a function in an integrated circuit device comprises a power-on circuit receiving a power input and initializing and generating a test activation signal, a test circuit receiving the test activation signal and generating a test result signal, and a threshold decision circuit receiving the test result signal and generating the function activation signal. The test circuit models a function of the integrated circuit device and generates the test result signal when the power input has reached a sufficient voltage to perform the function of the integrated circuit device. The threshold decision circuit generates the function activation signal if the test result signal indicates the power input has reached a sufficient voltage to perform the function of the integrated circuit device.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: March 2, 2010
    Assignee: Actel Corporation
    Inventors: Chung Sun, Eddy Huang, Stephen Chan
  • Publication number: 20090301282
    Abstract: A cutting apparatus for cutting a corner from sheet material to a selectable profile. In one set of embodiments, the cutting apparatus comprises a cutting assembly that includes a cutting element having a plurality of cutting profiles wherein each cutting profile may have a unique profile. The cutting assembly is configured such that an active cutting profile is selectable from the plurality of cutting profiles available on the cutting element. Engagement of the active cutting profile with one or more pieces of sheet material cuts a corner from the sheet material to a profile indicative of the active cutting profile. Cutting profiles may include curves having a uniform or variable radius of curvature and other forms appropriate for cutting a corner of sheet material.
    Type: Application
    Filed: June 10, 2008
    Publication date: December 10, 2009
    Inventors: Douglas Nelson, Lisa Painter, Rebecca Lidstrom, Peter Cooper, Sam Trewartha, Stephen Chan
  • Patent number: 7426667
    Abstract: An apparatus for generating a function activation signal to activate a function in an integrated circuit device comprises a power-on circuit receiving a power input and initializing and generating a test activation signal, a test circuit receiving the test activation signal and generating a test result signal, and a threshold decision circuit receiving the test result signal and generating the function activation signal. The test circuit models a function of the integrated circuit device and generates the test result signal when the power input has reached a sufficient voltage to perform the function of the integrated circuit device. The threshold decision circuit generates the function activation signal if the test result signal indicates the power input has reached a sufficient voltage to perform the function of the integrated circuit device.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: September 16, 2008
    Assignee: Actel Corporation
    Inventors: Chung Sun, Eddy Huang, Stephen Chan
  • Patent number: 7310760
    Abstract: An apparatus for generating a function activation signal to activate a function in an integrated circuit device comprises a power-on circuit receiving a power input and initializing and generating a test activation signal, a test circuit receiving the test activation signal and generating a test result signal, and a threshold decision circuit receiving the test result signal and generating the function activation signal. The test circuit models a function of the integrated circuit device and generates the test result signal when the power input has reached a sufficient voltage to perform the function of the integrated circuit device. The threshold decision circuit generates the function activation signal if the test result signal indicates the power input has reached a sufficient voltage to perform the function of the integrated circuit device.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: December 18, 2007
    Inventors: Chung Sun, Eddy Huang, Stephen Chan
  • Publication number: 20070028463
    Abstract: Paper-cutting apparatus includes a carriage for sliding along a guide, a cassette holder, and a cassette encasing a blade and interacting with the carriage, when mounted to the cassette holder, to expose a portion of the blade during attachment of the cassette holder to the carriage.
    Type: Application
    Filed: August 2, 2005
    Publication date: February 8, 2007
    Inventor: Stephen Chan
  • Publication number: 20070028738
    Abstract: A cutting apparatus for cutting sheets of paper, plastic, or the like, has a carriage for sliding along a rail, a cassette holder engageable with the carriage, and a cassette encasing a cutting blade and co-operable with the carriage, when held by the cassette holder, to expose a cutting edge of the cutting blade during engagement of the cassette holder with the carriage. The cassette, which may be separate from the carriage, has a rotary cutting blade and a cover covering the blade.
    Type: Application
    Filed: July 28, 2006
    Publication date: February 8, 2007
    Inventor: Stephen Chan
  • Publication number: 20060275849
    Abstract: Methods for purifying monoclonal antibody reagents having increased sensitivity or increased specificity for use in immunoassays for a particular analyte and assays using such antibody reagents. The monoclonal antibody reagents are prepared by serial elution of the monoclonal antibody purification lots at different pHs.
    Type: Application
    Filed: June 7, 2005
    Publication date: December 7, 2006
    Applicant: Beckman Coulter, Inc.
    Inventors: Dean Binger, Stephen Chan