Patents by Inventor Chih-Wen Chang

Chih-Wen 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: 20110302541
    Abstract: Methods and systems for evaluating checker quality of a verification environment are provided. In some embodiments, an overall sensitivity for the verification environment and an individual sensitivity for a respective checker are calculated. The overall sensitivity is a probability that a plurality of problematic design behaviors, which are propagated to a checker system including at least one checker, can be detected by the verification environment. The individual sensitivity is a probability that a plurality of problematic design behaviors, which are propagated to at least one specific probe among a plurality of probes of a design, can be detected by the checker corresponding to the specific probe. The overall checker sensitivity numbers can show the robustness of the check system. The individual checker sensitivity can guide the user which individual checker or checkers to improve.
    Type: Application
    Filed: December 23, 2010
    Publication date: December 8, 2011
    Applicant: SPRINGSOFT INC.
    Inventors: Kai Yang, Michael Lyons, Kuo-Ching Lin, Wei-Ting Tu, Chih-Wen Chang, Tein-Chun Wei
  • Publication number: 20090238105
    Abstract: A method for avoiding unnecessary excessive stay of short cycle in discontinuous reception mechanism begins by using the short cycle while the short cycle timer is running. Then, it determines whether the inactivity timer expires or not and whether the short cycle timer expires or not. If the inactivity timer expires but the short cycle timer does not expire, the short cycle is used. If the short cycle timer expires but the inactivity timer does not expire, the long cycle is used. If the inactivity timer and the short cycle timer expire at the same time, either the short cycle or the long cycle is selected for use.
    Type: Application
    Filed: March 20, 2009
    Publication date: September 24, 2009
    Applicant: Sunplus mMobile Inc.
    Inventors: Chunli Wu, Tsung-Liang Lu, Yen-Chen Chen, Chih-Wen Chang, Chien-Cheng Kuo
  • Publication number: 20030192888
    Abstract: A fastening mechanism for a package device is provided, which includes a plurality of first protrusions stagger-arranged in two rows at an edge of a lid of the package device, wherein a gap is formed between the two rows of the first protrusions; a second protrusion formed on an edge of a body of the package device and corresponding in position to the gap; at least a projection formed on the edge of the body and substantially opposed in position to the second protrusion; and at least a recess formed on the edge of the lid and corresponding in position to the projection of the body. By coupling the lid to the body, the second protrusion is engaged with the gap between the first protrusions, and the projection of the body is engaged with the recess of the lid, so as to provide strong fastening effect for the package device.
    Type: Application
    Filed: July 10, 2002
    Publication date: October 16, 2003
    Applicant: You Mao Shing Plastic Co., Ltd.
    Inventor: Chih-Wen Chang
  • Patent number: 6142899
    Abstract: An electromotive gear-shift control apparatus for bicycles, which is to be used in a bicycle provided with a gear-shift apparatus; the driving force for such apparatus is furnished with the power of pedals thereof; a motor is used for determining the input of the gear shift; the apparatus comprises a housing, a transmission mechanism, a switch mechanism, and an index mechanism; the housing is a fixed member fastened on the frame of a bicycle; the power source for gear shift is supplied by the driving force of the power shaft between two pedals of bicycle; the switch mechanism is mounted in the housing; the input power form the transmission mechanism is converted, by means of the motor, into a displacement output required by gear shift; the index mechanism is mounted behind the switch mechanism inside the housing, and it is used for converting the vector displacement form the switch mechanism into a step-function output, which is then transmitted, through a cable, into the gear-shift apparatus of the bicycle.
    Type: Grant
    Filed: August 20, 1998
    Date of Patent: November 7, 2000
    Assignee: Industrial Technology Research Institute
    Inventors: Cheng-Wen Liu, Chih-Wen Chang, Pai-Hsiang Hsu, Ching-Huan Tseng
  • Patent number: 6067692
    Abstract: A micro-adjustable belt structure including a belt head, a micro-adjusting strap, a micro-adjuster and a clip buckle. The micro-adjuster is formed with a dent in which a magnet is fixedly disposed. The clip buckle is also formed with a dent in which a magnetic member such as an iron plate is fixedly disposed corresponding to the magnet. The clip buckle is made of a non-magnetic material. The magnetic member is covered by a protective film for protecting the magnetic member from being rusted. The magnet and the magnetic member attract each other to attach the micro-adjuster and the clip buckle to each other.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: May 30, 2000
    Inventor: Chih-Wen Chang