Patents by Inventor Sang-II Choi

Sang-II Choi 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: 9998506
    Abstract: A method and apparatus for transmitting a groupcast to support a voice paging service in a VoIP system are provided. In the method, a voice paging message is received from a voice paging transmitting terminal and one or more voice paging messages are reproduced from the received voice paging message. A group table is used to change the destination address and port of each of the reproduced voice paging messages into the IP address and port of each of one or more voice paging receiving terminals. Each of the reproduced voice paging messages is unicast on the basis of the changed IP address and port.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: June 12, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Si-Nam Woo, Hyun-A Kim, Pyung-Bin Lim, Sang-II Choi
  • Publication number: 20180021756
    Abstract: Catalytic materials for exhaust gas purifying catalyst composites comprise platinum group metal (PGM)-containing catalysts whose PGM component(s) are provided as nanoparticles and are affixed to a refractory metal oxide, which may be provided as a precursor. Upon calcination of the catalysts, the PGM is thermally affixed to and well-dispersed throughout the support. Excellent conversion of hydrocarbons and nitrogen oxides can advantageously be achieved using such catalysts.
    Type: Application
    Filed: January 29, 2016
    Publication date: January 25, 2018
    Inventors: Andrey Karpov, David Preli, Knut Wassermann, Andreas Sundermann, Sang-II Choi, Ping Lu, Younan Xia