Patents by Inventor Chih-Wen Cheng

Chih-Wen Cheng 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: 20100189083
    Abstract: A wireless local network reconnecting system and method is provided. The method detects a connection-lost signal generated when a network node of the wireless local network group lost connection. A reconnecting coordinate is calculated according to the connection-lost signal and transmitted to the connection-lost network node through an external communication network. Afterwards, the method guides the connection-lost network node to move to the reconnecting coordinate and reconnect with the wireless local network group wirelessly. Since the external communication network is used to connect with the connection-lost network node, the connection-lost network node is able to reconnect with the wireless local network group through the proposed method.
    Type: Application
    Filed: January 23, 2009
    Publication date: July 29, 2010
    Applicant: MITAC TECHNOLOGY CORP.
    Inventors: Ta-Yung Lee, Chih-Wen Cheng, Cheng-Hsien Yang, Chia-Chuan Wu
  • Publication number: 20100103841
    Abstract: A wireless connection system and method are provided to connect diverse Ad-hoc network groups. A first Ad-hoc network group has a first network node and a first edge node wirelessly connecting with each other. The second Ad-hoc network group has a second network node and a second edge node wirelessly connecting with each other without connecting the first Ad-hoc network group. The first and second edge nodes have multiple wireless modules respectively. One of the wireless modules is used to connect wireless with other network nodes in the same Ad-hoc network group. The rest extra wireless module(s) is used to connect wirelessly with another extra wireless module(s) of the edge node(s) in different Ad-hoc network group(s). Therefore, the independent first and second Ad-hoc network groups are now capable of wirelessly connecting with each other.
    Type: Application
    Filed: October 24, 2008
    Publication date: April 29, 2010
    Applicant: MITAC TECHNOLOGY CORP.
    Inventors: Ta-Yung Lee, Chih-Wen Cheng, Cheng-Hsien Yang, Chia-Chuan Wu
  • Publication number: 20100103909
    Abstract: A system and method are provided for multiple nodes to wirelessly transmit in an Ad-hoc network architecture. First of all, an integration module of the system integrates a multi-node transmission protocol into a reservation column of a data packet. Next, an initial node of the system transmits the integrated data packet. Afterwards, according to the multi-node transmission protocol, one or more bridge node of the system receives the integrated data packet transmitted from the initial node. And finally, according to the multi-node transmission protocol, a destination node of the system receives the integrated data packet transmitted from the bridge node. By means of the proposed system and method, data transmission between multiple nodes is achieved under the Ad-hoc network architecture.
    Type: Application
    Filed: October 24, 2008
    Publication date: April 29, 2010
    Applicant: MITAC TECHNOLOGY CORP.
    Inventors: Ta-Yung Lee, Chih-Wen Cheng, Cheng-Hsien Yang, Chia-Chuan Wu
  • Publication number: 20100079247
    Abstract: A radio frequency identification (RFID) communication system and method is provided to resolve the power-consuming problems of an active RFID tag while operating at a receiving mode in a long duration. A designated channel is established between the reader and the RFID tag, and also the reader sends a designated message so that the actuated active RFID tag can receive the designated messages and dynamically enter into a receiving mode. Therefore, normal communications may be conducted between the reader and the RFID and the usage period or technical performance can be improved as well.
    Type: Application
    Filed: September 30, 2008
    Publication date: April 1, 2010
    Applicant: MITAC TECHONOLOGY CORP
    Inventors: Shin-Yao Perng, Ta-Yung Lee, Chih-Wen Cheng, Yuan-Ning Hsieh
  • Publication number: 20100070966
    Abstract: A method is provided to update firmware of a radio frequency identification (RFID) reader through a network system, wherein a management host issues an update message to a gateway through the network system, and then depending upon the location where reader firmware update data is stored, either the management host transmits the reader firmware update data through the gateway to each designated RFID reader, or the gateway directly transmits the reader firmware update data to each of the designated RFID readers. A microprocessor of the RFID reader stores the received reader firmware update data to a firmware data storage section of a memory unit thereof.
    Type: Application
    Filed: September 18, 2008
    Publication date: March 18, 2010
    Applicant: MITAC TECHNOLOGY CORP.
    Inventors: Shin-Yao Perng, Chih-Wen Cheng
  • Publication number: 20100014491
    Abstract: A method and system is provided to reinforce wireless communication capabilities between multiple network nodes of an wireless network group. The method and system first detects a wireless transmission capability between a first network node and a second network node. When the wireless transmission capability is lower than a threshold value, one set of reinforcing coordinates will be derived by introducing the first geographic information and the second geographic information. Afterwards, move a third network node to a position with the set of reinforcing coordinates to establish an alternative wireless transmission route between the first network note and second network node. Therefore, when an original wireless transmission route between any two network nodes is abnormal, the alternative wireless transmission route will be available in time and reduce the risks of losing transmission signals.
    Type: Application
    Filed: July 18, 2008
    Publication date: January 21, 2010
    Applicant: MITAC TECHONOLOGY CORP.
    Inventors: Ta-Yung Lee, Chih-Wen Cheng, Cheng-Hsien Yang, Chia-Chuan Wu
  • Publication number: 20090055660
    Abstract: The present invention discloses a security flash memory which includes a flash memory chip with a plurality of data transmission terminals, and a data encryption device. The data encryption device includes a verifier module with default pass code, a secret key module and a switching module. The verifier module compares a pass code with the default pass code for outputting a control signal. The secret key module is used for data encryption and data decryption. The switching module is connected to the verifier module, the data transmission terminals of the flash memory chip and the secret key module, and may connect or disconnect the data transmission terminals of the flash chip and the secret key module in response to the control signal.
    Type: Application
    Filed: December 17, 2007
    Publication date: February 26, 2009
    Inventor: Chih-Wen Cheng
  • Publication number: 20080307123
    Abstract: A two-way connectivity USB control device and its operation method are disclosed. The present invention solves a problem of the prior art that requires users to manually switch a USB controller between an active mode and a passive mode and set a predetermined time interval as in prior art. The two-way connectivity USB control device detects whether or not there is a voltage input. If the detection result is yes, then the two-way connectivity USB control device is switched to a transmit mode, or else the two-way connectivity USB control device is switched to a transparent mode for accessing data stored in an external device by issuing a control command directly.
    Type: Application
    Filed: June 4, 2008
    Publication date: December 11, 2008
    Inventor: Chih-Wen Cheng
  • Publication number: 20080222733
    Abstract: An anti-pirate memory card is provided for preventing unauthorized reproduction, wherein the addresses of all bad blocks of each memory unit of the memory card are recorded during manufacturing process, and are converted into an identification code by a secret algorithm, and finally the identification code is written into a control chip and the memory unit. The memory card is effective in preventing software capture and hardware capture.
    Type: Application
    Filed: March 8, 2007
    Publication date: September 11, 2008
    Applicant: DDTIC Corporation, Ltd.
    Inventor: Chih Wen Cheng
  • Publication number: 20080022034
    Abstract: A segmentation design for dividing the flash memory of a flash disc into three segments A, B and C, or more segments. Segment A is a control area, segment B (only readable but not writable to ordinary user) is a storage area particularly for storing the special program and data offered by the product manufacturer, and segment C is a storage space readable and writable to ordinary users. Stored in the segment A are: 1. memory brand, specification, size, and segmentation information, etc, 2. information of the product manufacturer, 3. account number and password set by the user, 4. settings of the device description for segment B, and 5. settings for the readable and writable area. A verifying program will display a dialog frame on the personal computer screen, asking the user to enter account number and password before entering the segment C, and only one device will be displayed on a personal computer screen after insertion of the flash disc.
    Type: Application
    Filed: July 20, 2006
    Publication date: January 24, 2008
    Applicant: DDTIC Corporation, Ltd.
    Inventor: Chih Wen Cheng
  • Publication number: 20080012153
    Abstract: A chip package that can be directly used by users, on one end of the chip package is provided a plurality of metal terminals that can be connected to electronic equipment directly, such as computer. A vertical hole in communication with a chip substrate or a protection circuit board inside the chip package can be formed on the chip package, and by inserting resistors with different resistances (or other electronic members) in the vertical hole, it can micro-adjust the electronic characteristic of the chip or improve the protection ability of the protection circuit board.
    Type: Application
    Filed: January 24, 2007
    Publication date: January 17, 2008
    Applicant: DDTIC Corporation, Ltd.
    Inventor: Chih Wen Cheng
  • Publication number: 20060031325
    Abstract: The present invention discloses a method for managing email with analyzing the mail behavior. The method utilizes the mail policies, such as the envelope information and the header information, to verify the transmission data one by one while the agent receives the email. Then, the method performs a corresponding action in accordance with the verified result. When the mail policy is defined as behavior of the spam, the email will be blocked while matched; and when the mail policy is defined as the exempted mail, the email will be delivered while matched. The present invention can achieve the purpose of managing the email communication and blocking the spam, and can improve the communication efficiency and reduce the operation cost.
    Type: Application
    Filed: July 1, 2004
    Publication date: February 9, 2006
    Inventor: Chih-Wen Cheng
  • Publication number: 20030055245
    Abstract: The present invention provides an efficient synthetic process for making benazepril and analogues thereof by having an intermediate compound undergo epimerization and kinetic resolution.
    Type: Application
    Filed: May 21, 2002
    Publication date: March 20, 2003
    Applicant: ScinoPharm Taiwan, Ltd.
    Inventors: Wei-Hong Tseng, Kau-Ming Cheng, George Schloemer, Chien-Wen Chen, Chih-Wen Cheng
  • Patent number: 6318376
    Abstract: A cigarette filter tip structure includes a cigarette holder, and a filter base mounted on the bottom of the cigarette holder. The cigarette holder includes a compartment defined therein and having a bottom formed with a shoulder, the compartment having a center defining a compression hole, four L-shaped support bases each mounted in an inner wall of the compartment, and each having a bottom formed with a transversely extending positioning portion. The filter base has a top defining a filter recess for receiving the shoulder of the cigarette holder, and a bottom defining a passage and formed with a mouth suction portion.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: November 20, 2001
    Inventor: Chih-Wen Cheng