Patents by Inventor Chen-Lang Fan

Chen-Lang Fan 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).

  • Wireless blackboard eraser and dust collector
    Patent number: 7222391
    Abstract: The present invention provides a battery-operated blackboard eraser and dust collector, which is composed of a shell body, an air blower, and an erasing plate set. The air blower is installed inside the shell body and the erasing plate set is disposed under the shell body. The eraser shell consists of a piece of erasing cloth, a piece of air-permeable sponge, a base plate, and a group of air-permeable papers.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: May 29, 2007
    Inventor: Chen-Lang Fan
  • Wireless blackboard eraser and dust collector
    Publication number: 20040211022
    Abstract: The present invention provides a kind of wireless blackboard eraser and dust collector, which is composed of a shell body, an air blower, and an erasing plate set. Where, the air blower is installed inside the shell body and the erasing plate set under the shell body, and the eraser shell consists of a piece of erasing cloth, a piece of air-permeable sponge, a base plate, and a group of air-permeable papers.
    Type: Application
    Filed: April 23, 2003
    Publication date: October 28, 2004
    Inventor: Chen-Lang Fan
  • Blackboard eraser and dust collecter
    Patent number: D505157
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: May 17, 2005
    Inventor: Chen-Lang Fan