Patents by Inventor Yang Ning Di

Yang Ning Di 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).

  • Multi-functional cleaning and filtering system for aquarium tank
    Patent number: 6202677
    Abstract: A cleaning and filtering apparatus and method for a tank such as an aquarium. The major components are an inlet water controller, a suction unit, and a filter container unit. The filter container is selectively connected to the suction unit and a waste outlet to clean the tank and discharge waste water from the tank. The inlet water controller comprises a float connected to a valve to automatically replace the discharged water when the water level in the tank drops.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: March 20, 2001
    Inventors: Chi Chung Chen, Yang Ning Di