Patents by Inventor Cangsang Duan

Cangsang Duan 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).

  • Apparatus for page-pressing and barrier-free page-turning
    Patent number: 11453233
    Abstract: Disclosed is an apparatus for page-pressing and barrier-free page-turning. The apparatus includes page-pressing devices and a placement board. The page-pressing device is capable of switching between a first state and a second state. When the page-pressing device is in the first state, the page-pressing device is capable of tightly pressing against a book page(s) on the placement board. When the page-pressing device is in the second state, the page-pressing device is capable of releasing the press onto the book page(s). The page-pressing device is capable of mechanically self-locking to maintain a contact pressure to the book page(s) when the page-pressing device is in the first state to press against the book page(s), while the power causing the contact pressure no longer exists.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: September 27, 2022
    Inventor: Cangsang Duan
  • Apparatus for Page-pressing and Barrier-free Page-turning
    Publication number: 20210252898
    Abstract: Disclosed is an apparatus for page-pressing and barrier-free page-turning. The apparatus includes page-pressing devices and a placement board. The page-pressing device is capable of switching between a first state and a second state. When the page-pressing device is in the first state, the page-pressing device is capable of tightly pressing against a book page(s) on the placement board. When the page-pressing device is in the second state, the page-pressing device is capable of releasing the press onto the book page(s). The page-pressing device is capable of mechanically self-locking to maintain a contact pressure to the book page(s) when the page-pressing device is in the first state to press against the book page(s), while the power causing the contact pressure no longer exists.
    Type: Application
    Filed: May 5, 2021
    Publication date: August 19, 2021
    Inventor: Cangsang Duan