Patents by Inventor Koa-Cherng Huang

Koa-Cherng Huang 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).

  • Auto turning-off humidifier
    Patent number: 4853161
    Abstract: An auto turning-off humidifier having a water sensor with a sensing needle that can automatically function to cut off electricity if the water in the hollowed space of the base becomes less and cannot be touched by the sensing needle.
    Type: Grant
    Filed: July 11, 1988
    Date of Patent: August 1, 1989
    Assignee: Han Chi Hang Co., Ltd.
    Inventor: Koa-Cherng Huang