Patents Assigned to Goldmaster Development Limited
  • Solar and dynamo powered radio with light
    Patent number: D504410
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: April 26, 2005
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar and dynamo powered radio with light
    Patent number: D504411
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: April 26, 2005
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar and dynamo powered radio with light
    Patent number: D505128
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: May 17, 2005
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar and dynamo powered radio with light
    Patent number: D505408
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: May 24, 2005
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar powered lamp
    Patent number: D452928
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: January 8, 2002
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar folding panel
    Patent number: D528501
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: September 19, 2006
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar panel
    Patent number: D536299
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: February 6, 2007
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar waterproof torch light
    Patent number: D470260
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: February 11, 2003
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Toy ferris wheel
    Patent number: D572317
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: July 1, 2008
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar powered light
    Patent number: D495083
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: August 24, 2004
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar powered light
    Patent number: D495444
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: August 31, 2004
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar powered light
    Patent number: D496484
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: September 21, 2004
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Combined flashlight and fluorescent lamp
    Patent number: D378142
    Type: Grant
    Filed: August 24, 1995
    Date of Patent: February 18, 1997
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Torch
    Patent number: D386269
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: November 11, 1997
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Ventilating fan
    Patent number: D409741
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: May 11, 1999
    Assignee: Goldmaster Development Limited
    Inventor: Lam Yuen-Ming
  • Combined radio and torch
    Patent number: D410099
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: May 18, 1999
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam
  • Solar powered lamp
    Patent number: D422735
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: April 11, 2000
    Assignee: Goldmaster Development Limited
    Inventor: Yuen-Ming Lam