Patents by Inventor Chung-Hing Choi

Chung-Hing 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).

  • Sport rackets
    Patent number: 5533724
    Abstract: A sports racket has a handle 10 and two different playing surfaces 11 and 12. The same racket can therefore be conveniently used for different sports or recreations, or used for different purposes or different scoring in a single recreation.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: July 9, 1996
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Soap bubble toy
    Patent number: D510960
    Type: Grant
    Filed: January 4, 2005
    Date of Patent: October 25, 2005
    Inventor: Chung-Hing Choi
  • Play cube
    Patent number: D517126
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: March 14, 2006
    Inventor: Chung Hing Choi
  • Play cube
    Patent number: D517127
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: March 14, 2006
    Inventor: Chung Hing Choi
  • Propelling and catching device
    Patent number: D363960
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: November 7, 1995
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy sword
    Patent number: D364659
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: November 28, 1995
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Mask
    Patent number: D365859
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: January 2, 1996
    Assignee: Hing Fat Toys Manufacturer Ltd.
    Inventor: Chung-Hing Choi
  • Toy landscape
    Patent number: D367298
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: February 20, 1996
    Assignee: Hing Fat Toys Manufacturer, Ltd.
    Inventor: Chung-Hing Choi
  • Toy landscape
    Patent number: D367299
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: February 20, 1996
    Assignee: Hing Fat Toys Manufacturer Ltd.
    Inventor: Chung-Hing Choi
  • Toy sceptre
    Patent number: D372276
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: July 30, 1996
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy bow
    Patent number: D382605
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: August 19, 1997
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy sword
    Patent number: D397170
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: August 18, 1998
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy sword
    Patent number: D397171
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: August 18, 1998
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy sword
    Patent number: D399891
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: October 20, 1998
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy sword
    Patent number: D399892
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: October 20, 1998
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy sword
    Patent number: D409264
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: May 4, 1999
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy sword
    Patent number: D416295
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: November 9, 1999
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy sword
    Patent number: D416953
    Type: Grant
    Filed: January 7, 1999
    Date of Patent: November 23, 1999
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy shield
    Patent number: D417246
    Type: Grant
    Filed: January 7, 1999
    Date of Patent: November 30, 1999
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi
  • Toy armour
    Patent number: D424631
    Type: Grant
    Filed: January 7, 1999
    Date of Patent: May 9, 2000
    Assignee: Hing Fat Toys Manufacturer Limited
    Inventor: Chung-Hing Choi