Patents by Inventor Wai-Wah Yiu

Wai-Wah Yiu 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: 8551117
    Abstract: A skin removal device includes a housing having a handle portion, a drum assembly coupled to the handle portion and including a drum, the drum having an abrasive outer surface configured to abrade skin of a user during rotation of the drum, and an electromechanical drive system disposed at least partially within the housing and configured to rotate the drum. The drum assembly is moveable in a lateral direction relative to the handle portion to enable insertion and removal of the drum assembly.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: October 8, 2013
    Assignee: Soft Lines International, Ltd.
    Inventor: Wai Wah Yiu
  • Publication number: 20120226289
    Abstract: A skin removal device includes a housing having a handle portion, a drum assembly coupled to the handle portion and including a drum, the drum having an abrasive outer surface configured to abrade skin of a user during rotation of the drum, and an electromechanical drive system disposed at least partially within the housing and configured to rotate the drum. The drum assembly is moveable in a lateral direction relative to the handle portion to enable insertion and removal of the drum assembly.
    Type: Application
    Filed: December 13, 2011
    Publication date: September 6, 2012
    Inventor: Wai Wah Yiu
  • Publication number: 20050187563
    Abstract: A device for removing unwanted hair, including a hair-plucking assembly, and a vibration assembly, a driving assembly, and a housing. The hair-plucking assembly includes two groups of disc assemblies that remove hair as they rotate. As the hair-plucking assembly removes hair, the vibration assembly vibrates to massage the area of hair removal to minimize discomfort associated with the hair removal.
    Type: Application
    Filed: November 23, 2004
    Publication date: August 25, 2005
    Inventor: Wai-Wah Yiu
  • Publication number: 20050172490
    Abstract: A shearing device is provided for such applications as trimming hair in the nose. The shearing device includes a housing having a top portion and a bottom portion, where the top portion has at least one opening and a plurality of ridges that form channels adjacent to the at least one opening. At least one cutting blade assembly is disposed in each of the openings in the top portion of the housing of the shearing device. Each cutting blade assembly includes one or more blade members. The top portion of the shearing device includes a plurality of ridges that bracket the cutting teeth of the blade members on the cutting blade assembly. The plurality of ridges form channels that expose the teeth of the trimmer blade members, and space the teeth on the blade members of the device away from the skin. The length of the hairs remaining after cutting is determined by the depth of the channels formed by the ridges.
    Type: Application
    Filed: December 29, 2004
    Publication date: August 11, 2005
    Inventor: Wai-Wah Yiu
  • Publication number: 20050144783
    Abstract: A shearing device is provided for, for example, trimming hair in the nose, that spaces the teeth on the blades of the device from the skin. The shearing device includes a housing having a top portion and a bottom portion, where the top portion has an opening and a plurality of ridges that form channels adjacent to the opening. At least one cutting blade is disposed in the opening in the top portion of the housing of the shearing device. The top portion of the shearing device includes ridges, and brackets the cutting teeth of the trimmer on either side and includes a plurality of ridges forming channels that expose the teeth on the trimmer blades. The length of the hairs remaining after cutting is determined by the depth of the channels.
    Type: Application
    Filed: December 29, 2003
    Publication date: July 7, 2005
    Inventor: Wai-Wah Yiu
  • Patent number: 6824546
    Abstract: A device for removing unwanted hair, including a hair-plucking assembly, and a vibration assembly, a driving assembly, and a housing. The hair-plucking assembly includes two groups of disc assemblies that remove hair as they rotate. As the hair-plucking assembly removes hair, the vibration assembly vibrates to massage the area of hair removal to minimize discomfort associated with the hair removal.
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: November 30, 2004
    Assignee: Soft Lines, Ltd.
    Inventor: Wai-Wah Yiu
  • Patent number: 6559367
    Abstract: The present invention offers an adjustable, versatile windless windchime activation device, which can be modified to accept and activate many different varieties of windchime assemblies. The magnetic repulsive force between an electromagnet located within the windchime activation device and a permanent magnet positioned on a sail, which sail attaches to the sound inducing member of a windchime assembly, activates the windchimes in the absence of wind.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: May 6, 2003
    Assignee: Soft Lines, Ltd.
    Inventor: Wai-Wah Yiu
  • Patent number: 6436106
    Abstract: A device for removing unwanted hair, including a hair-plucking assembly, a vibration assembly, a driving assembly, and a housing. The hair-plucking assembly includes at least two groups of disc assemblies that remove hairs as they rotate. In an alternative embodiment, disc assemblies are arranged in at least two rows, where disc assemblies arranged in one row rotate in an opposite direction to disc assemblies arranged in another row. As the hair-plucking assembly removes hair, the vibration assembly vibrates to massage the area of hair removal to minimize discomfort associated with the hair removal. In addition, an illumination mechanism may be added to the hair removal device to illuminate the hair removal area so as to help the user see the progress of hair removal.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: August 20, 2002
    Assignee: Soft Lines, Ltd.
    Inventor: Wai-Wah Yiu
  • Publication number: 20010014809
    Abstract: A device for removing unwanted hair, including a hair-plucking assembly, a vibration assembly, a driving assembly, and a housing. The hair-plucking assembly includes at least two groups of disc assemblies that remove hairs as they rotate. In an alternative embodiment, disc assemblies are arranged in at least two rows, where disc assemblies arranged in one row rotate in an opposite direction to disc assemblies arranged in another row. As the hair-plucking assembly removes hair, the vibration assembly vibrates to massage the area of hair removal to minimize discomfort associated with the hair removal. In addition, an illumination mechanism may be added to the hair removal device to illuminate the hair removal area so as to help the user see the progress of hair removal.
    Type: Application
    Filed: December 28, 2000
    Publication date: August 16, 2001
    Inventor: Wai-Wah Yiu
  • Patent number: 6159222
    Abstract: The invention relates to a depilatory device having a compressible coil spring positioned between two arms which may be used to grasp and pluck hair for temporary hair removal or to radiate radio waves to permanently destroy hairs that are either proximal to the coil spring or held between the coils of the coil spring.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: December 12, 2000
    Assignee: Soft Lines Ltd.
    Inventor: Wai-Wah Yiu
  • Patent number: D509626
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: September 13, 2005
    Assignee: K.I.S. Ltd.
    Inventor: Wai-Wah Yiu
  • Patent number: D447282
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: August 28, 2001
    Assignee: Emjoi, Inc.
    Inventor: Wai-Wah Yiu
  • Patent number: D447811
    Type: Grant
    Filed: January 3, 2001
    Date of Patent: September 11, 2001
    Assignee: Emjoi, Inc.
    Inventor: Wai-Wah Yiu
  • Patent number: D450157
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: November 6, 2001
    Assignee: Emjoi, Inc.
    Inventor: Wai-Wah Yiu
  • Patent number: D518237
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: March 28, 2006
    Assignee: K.I.S. Ltd.
    Inventor: Wai-Wah Yiu
  • Patent number: D499842
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: December 14, 2004
    Assignee: Soft Lines Limited
    Inventor: Wai-Wah Yiu
  • Patent number: D676200
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: February 12, 2013
    Assignee: Forstar Limited
    Inventor: Wai Wah Yiu
  • Patent number: D678614
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: March 19, 2013
    Assignee: Soft Lines International, Ltd.
    Inventor: Wai Wah Yiu
  • Patent number: D681277
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: April 30, 2013
    Assignee: Soft Lines International, Ltd.
    Inventor: Wai Wah Yiu
  • Patent number: D686370
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: July 16, 2013
    Assignee: Soft Lines International, Ltd.
    Inventor: Wai Wah Yiu