Patents by Inventor Hwang F. Lin

Hwang F. Lin 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).

  • Cleaning device for armrest belt conveyor of the electric escalator
    Patent number: 4934512
    Abstract: An apparatus for cleaning an armrest belt conveyor of an escalator. The apparatus permits use of the escalator during cleaning. Preferably, excess cleaner can be scraped off from the conveyor and reused.
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: June 19, 1990
    Inventors: Hwang F. Lin, Se K. C. Wu