Patents by Inventor Hsai Chin Hui

Hsai Chin Hui 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).

  • Trailer coupling dock theft-proof lock
    Patent number: 7909351
    Abstract: A trailer coupling dock theft-proof lock to prevent unauthorized coupling and hauling of a trailer during parking includes a locking dock, a coupling assembly and a lock assembly. The coupling assembly can be latched in a dome of a trailer coupling dock. By locking and unlocking of the lock assembly the coupling assembly can be retained or removed so that unauthorized towing of the trailer can be prevented.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: March 22, 2011
    Assignee: Handyway Co., Ltd.
    Inventor: Hsai Chin Hui