Patents by Inventor Li-Sheng Chang

Li-Sheng 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: 11967357
    Abstract: A memory unit with time domain edge delay accumulation for computing-in-memory applications is controlled by a first word line and a second word line. The memory unit includes at least one memory cell, at least one edge-delay cell multiplexor and at least one edge-delay cell. The at least one edge-delay cell includes a weight reader and a driver. The weight reader is configured to receive a weight and a multi-bit analog input voltage and generate a multi-bit voltage according to the weight and the multi-bit analog input voltage. The driver is connected to the weight reader and configured to receive an edge-input signal. The driver is configured to generate an edge-output signal having a delay time according to the edge-input signal and the multi-bit voltage. The delay time of the edge-output signal is positively correlated with the multi-bit analog input voltage multiplied by the weight.
    Type: Grant
    Filed: January 21, 2022
    Date of Patent: April 23, 2024
    Assignee: NATIONAL TSING HUA UNIVERSITY
    Inventors: Meng-Fan Chang, Ping-Chun Wu, Li-Yang Hong, Jin-Sheng Ren, Jian-Wei Su
  • Publication number: 20230251241
    Abstract: Disclosed herein are methods for the detection of the presence of sperm DNA fragmentation in a semen sample. The methods include embedding of sperm cells of the semen sample in a gel, denaturing DNA of the sperm cells, and lysing the nuclear proteins of the sperm cells. The present method includes an ionic surfactant sodium dodycyl sulfate (SDS) and a chaotropic agent urea in the lysis solution for releasing DNA from protamine of chromosome, which significantly reduces the time required for lysis. A kit for detecting sperm DNA fragmentation in a semen sample is also disclosed.
    Type: Application
    Filed: April 13, 2023
    Publication date: August 10, 2023
    Inventors: Cheng-Teng Hsu, Li-Sheng Chang, Hsiu-Chin Lee
  • Patent number: 11644455
    Abstract: Disclosed herein are methods for the detection of the presence of sperm DNA fragmentation in a semen sample. The methods include embedding of sperm cells of the semen sample in a gel, denaturing DNA of the sperm cells, and lysing the nuclear proteins of the sperm cells. The present method includes an ionic surfactant sodium dodycyl sulfate (SDS) and a chaotropic agent urea in the lysis solution for releasing DNA from protamine of chromosome, which significantly reduces the time required for lysis. A kit for detecting sperm DNA fragmentation in a semen sample is also disclosed.
    Type: Grant
    Filed: December 7, 2021
    Date of Patent: May 9, 2023
    Assignee: Bonraybio Co., Ltd.
    Inventors: Cheng-Teng Hsu, Li-Sheng Chang, Hsiu-Chin Lee
  • Publication number: 20230075204
    Abstract: Disclosed herein is a method for the detection of the presence of sperm DNA fragmentation in a semen sample. The method comprises a step of embedding the semen sample containing sperm cells in a gel comprising acrylamide, acrylic acid, methacrylic acid, N-isopropylacrylamide (NIPAM), alginate, or polyethylene glycol (PEG), to obtain a sperm cells-embedded gel. A kit for detecting sperm DNA fragmentation in a semen sample is also disclosed.
    Type: Application
    Filed: October 17, 2022
    Publication date: March 9, 2023
    Inventors: Cheng-Teng Hsu, Li-Sheng Chang, Hsiu-Chin Lee
  • Publication number: 20220195492
    Abstract: Disclosed herein is a method for the detection of the presence of sperm DNA fragmentation in a semen sample. The method comprises a step of embedding the semen sample containing sperm cells in a gel comprising acrylamide, acrylic acid, methacrylic acid, N-isopropylacrylamide (NIPAM), alginate, or polyethylene glycol (PEG), to obtain a sperm cells-embedded gel. A kit for detecting sperm DNA fragmentation in a semen sample is also disclosed.
    Type: Application
    Filed: December 7, 2021
    Publication date: June 23, 2022
    Inventors: Cheng-Teng Hsu, Li-Sheng Chang, Hsiu-Chin Lee
  • Publication number: 20220196630
    Abstract: Disclosed herein are methods for the detection of the presence of sperm DNA fragmentation in a semen sample. The methods include embedding of sperm cells of the semen sample in a gel, denaturing DNA of the sperm cells, and lysing the nuclear proteins of the sperm cells. The present method includes an ionic surfactant sodium dodycyl sulfate (SDS) and a chaotropic agent urea in the lysis solution for releasing DNA from protamine of chromosome, which significantly reduces the time required for lysis. A kit for detecting sperm DNA fragmentation in a semen sample is also disclosed.
    Type: Application
    Filed: December 7, 2021
    Publication date: June 23, 2022
    Inventors: Cheng-Teng Hsu, Li-Sheng Chang, Hsiu-Chin Lee