Patents by Inventor Pao Chi Chang

Pao Chi 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).

  • Publication number: 20090120513
    Abstract: A multiple-input gas adjuster includes a case having a chamber therein, an input channel, an output channel communicated with the chamber, a first input bore and a second input bore communicated with the input channel and the chamber. A pressure adjusting mechanism has a film assembly, a movable shaft to be reciprocated by the film assembly, a swing device pivoted in the case with an end thereof connected to the movable shaft and an opposite end for sealing the second input bore, and a driving device received in the first input bore and connected to the movable shaft for reciprocation to seal the first input bore. High pressure gas may flows into the first and second input bores through the input channel for pressure adjusting operation. With the action of the pressure adjusting mechanism, the present invention provides a well pressure reducing and stabilizing performance.
    Type: Application
    Filed: December 10, 2007
    Publication date: May 14, 2009
    Inventors: Pao-Chi Chang, Sen-Yu Wu, Shu-Mei Liu
  • Publication number: 20080240249
    Abstract: A video compressor has a real-time compression with a constant frame rate. The complexity in the compression of each frame is controlled to be smaller than a maximum value according to power management or compression time requirement. Delay jitter is eliminated. The present invention can be applied to MPEG-like video coding systems, such as H.264, MPEG4 and H.263.
    Type: Application
    Filed: August 16, 2007
    Publication date: October 2, 2008
    Inventors: Ming-Chen Chien, Pao-Chi Chang
  • Publication number: 20070164776
    Abstract: A device for measuring gray-to-gray response times in a display utilizes light detectors to measure the response time of gray images of the display rapidly. The device is used in a measuring system having a temporal signal integrator and a light scope. The temporal signal integrator provides a plurality of signals of gray images for multiple areas on the display, and the light scope includes the light detectors. Each active light detector is distributed to measure the response time of the gray images on each of the areas.
    Type: Application
    Filed: December 12, 2006
    Publication date: July 19, 2007
    Inventors: Pao-Chi Chang, Mu-Lin Chao, Feng-Chou Ni, Hsin-Mao Huang, Jhih-Hong Jiang
  • Patent number: 7020613
    Abstract: A method and system of mixing audios to convert a plurality of input voices into a single output voice is described. The system of mixing audios has a decoding device, an audio mixing device and a frame package unit. The input voices including a plurality of audio frames are partially decoded to acquire audio parameters of the input voices by the decoding device. One audio frame of the input voices is selected by the audio mixing device to obtain a target frame according to the audio parameters later. The target frame is then packaged so as to be identical to the original format of the input voices by the frame package unit.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: March 28, 2006
    Assignee: AT Chip Corporation
    Inventors: Pao-Chi Chang, Ching-Chang Chen
  • Publication number: 20030023428
    Abstract: A method and system of mixing audios to convert a plurality of input voices into a single output voice is described. The system of mixing audios has a decoding device, an audio mixing device and a frame package unit. The input voices including a plurality of audio frames are partially decoded to acquire audio parameters of the input voices by the decoding device. One audio frame of the input voices is selected by the audio mixing device to obtain a target frame according to the audio parameters later. The target frame is then packaged so as to be identical to the original format of the input voices by the frame package unit.
    Type: Application
    Filed: July 26, 2002
    Publication date: January 30, 2003
    Applicant: AT CHIP CORPORATION
    Inventors: Pao-Chi Chang, Ching-Chang Chen
  • Patent number: 6509373
    Abstract: Disclosed is a new Streptomyces candidus strain, and relevant uses thereof.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: January 21, 2003
    Assignee: Development Center for Biotechnology
    Inventors: Ming Shiang, Mann Yan Kuo, Kuei Chih Chu, Pao Chi Chang, Hsiu Ying Chang, Hai Ping Lee
  • Patent number: 6193964
    Abstract: Disclosed is a new Streptomyces candidus strain, and relevant uses thereof.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: February 27, 2001
    Assignee: Development Center for Biotechnology
    Inventors: Ming Shiang, Mann Yan Kuo, Kuei Chih Chu, Pao Chi Chang, Hsiu Ying Chang, Hai Ping Lee
  • Patent number: 4974223
    Abstract: The present invention identifies boundaries of data packets within a serial data stream and transfers data belonging to these packets to an external device for processing or storage. Identification is accomplished at relatively high speed by parallel processing techniques using a state machine. Data may be transmitted through separate channels to a multiple channel link. This link selects one channel at a time for a predetermined period of time, and allows the data stream from the selected channel to be transmitted to the flag detector. Some of the bits in the digital data stream may be part of a flag. The flag detector generates a value corresponding to the number of bits which may correspond to a portion of a flag in the data that has entered the flag detector. Additional data from the digital data stream entering the flag detector may include the remaining bits of the flag. If so, then the detector indicates that a flag has been found.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: November 27, 1990
    Assignee: International Business Machines Corporation
    Inventors: Teofilo C. Ancheta, Alexander Birman, Pao-Chi Chang, Roch Guerin