Patents by Inventor Duk-Chea Yoon

Duk-Chea Yoon 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).

  • Floppy disk drive
    Patent number: D462073
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: August 27, 2002
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Duk-Chea Yoon
  • Wireless keyboard
    Patent number: D462681
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: September 10, 2002
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Duk Chea Yoon
  • Optical mouse for computer
    Patent number: D487464
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: March 9, 2004
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Duk Chea Yoon, Jong Chan Kwon
  • Ear-microphone for cellular phones
    Patent number: D430547
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: September 5, 2000
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Duk Chea Yoon
  • Ear-microphone for cellular phones
    Patent number: D430860
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: September 12, 2000
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Duk Chea Yoon
  • Ear-microphone for cellular phones
    Patent number: D431030
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: September 19, 2000
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Duk Chea Yoon