Patents by Inventor Andy Tu

Andy Tu 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).

  • Application-independent messaging system
    Patent number: 11943183
    Abstract: Among other things, embodiments of the present disclosure improve the functionality of electronic messaging software and systems by allowing senders to transmit messages and content using a messaging system, and recipients to access such messages and content, even if the recipients do not have access to the messaging system.
    Type: Grant
    Filed: May 31, 2023
    Date of Patent: March 26, 2024
    Assignee: Snap Inc.
    Inventors: Jacob Andreou, Yang Dai, Sebastian Gil, Tengfei Li, Yansong Liu, Andy Ly, Chamal Samaranayake, Jianwei Tu
  • LOG ANOMALY DETECTION IN CONTINUOUS ARTIFICIAL INTELLIGENCE FOR IT OPERATIONS
    Publication number: 20240089275
    Abstract: A computer-implemented method, a computer program product, and a computer system for log anomaly detection. A computer receives a windowed log of incoming raw log messages. A computer compares statistical distribution metrics of entities in the windowed log with a statistical distribution extracted from a real-time statistical model for the entities. In response to the statistical distribution metrics being statistically different from the statistical distribution extracted from the real-time statistical model for the entities, a computer tags the windowed log as an entity anomaly. A computer computes a distance between an average word embedding vector in the windowed log and a statistical distribution extracted form a real-time statistical model for word embeddings. In response to the distance being greater than a predetermined threshold, a computer tags the windowed log as a word embedding anomaly. A computer sends to a user an alert with an anomaly severity level.
    Type: Application
    Filed: September 9, 2022
    Publication date: March 14, 2024
    Inventors: Lu An, An-Jie Andy Tu, Xiaotong LIU, ANBANG XU, Rama Kalyani T. Akkiraju, Neil H. Boyette
  • Capacitive parametric zero crossing detector device, circuit and method
    Patent number: 9577623
    Abstract: A capacitive parametric zero crossing detection circuit has a nonlinear voltage controlled capacitive device coupled to an input voltage to convert a zero crossing current pulse into zero crossing voltage signal.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: February 21, 2017
    Assignee: Microchip Technology Inc.
    Inventors: Ching Chu, Benedict Choy, Andy Tu
  • Ultrasound capacitive T/R switch device, circuit
    Patent number: 9568597
    Abstract: An ultrasound image system has a plurality of channels. At least one of the plurality of channels has a capacitive T/R switch.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: February 14, 2017
    Assignee: Microchip Technology Inc.
    Inventors: Benedict Choy, Ching Chu, Andy Tu
  • CAPACITIVE PARAMETRIC ZERO CROSSING DETECTOR DEVICE, CIRCUIT AND METHOD
    Publication number: 20150070034
    Abstract: A capacitive parametric zero crossing detection circuit has a nonlinear voltage controlled capacitive device coupled to an input voltage to convert a zero crossing current pulse into zero crossing voltage signal.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 12, 2015
    Inventors: Ching Chu, Ben Choy, Andy Tu
  • ULTRASOUND CAPACITIVE T/R SWITCH DEVICE, CIRCUIT
    Publication number: 20150049577
    Abstract: An ultrasound image system has a plurality of channels. At least one of the plurality of channels has a capacitive T/R switch.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 19, 2015
    Inventors: Benedict C.K. Choy, Ching Chu, Andy Tu