Patents by Inventor Zezheng Hou

Zezheng Hou 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).

  • Limited use hearing aid
    Patent number: 8189830
    Abstract: A hearing aid (or other assistive listening device) that is suitable for limited use is disclosed. The hearing aid can be configured to be usable for a predetermined period of time. After the expiration of the predetermined period of time, the hearing aid can cease to operate or operate in a degraded manner. Once the hearing aid has become significantly degraded, it can be either disposed of or reconfigured (or reprogrammed) so as to be usable for an additional period of time.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: May 29, 2012
    Assignee: Apherma, LLC
    Inventor: Zezheng Hou