Patents by Inventor Wu Qilian

Wu Qilian 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).

  • Double-axis belt-driven tape measure
    Patent number: 7024790
    Abstract: A measuring tape having a housing for receiving a spring-powered double-axis reel assembly. The reel assembly includes a primary spool having a length of measuring tape wound around it, and a secondary spool having a spring. The primary and secondary spools are connected by an endless flexible member.
    Type: Grant
    Filed: June 11, 2004
    Date of Patent: April 11, 2006
    Assignee: Ningbo JL Measuring & Tools,Co., Ltd.
    Inventor: Wu Qilian