Patents by Inventor Chiang M. Chen

Chiang M. Chen 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).

  • Portable magnetic drafting board
    Patent number: 5343625
    Abstract: A drafting board includes a base, a shoulder formed in the perimeter of the upper surface of the base, a magnetic board engaged in the shoulder of the base, two holes formed in the bottom surface of the base, and a rod engaged in each of the holes of the base for elevating the upper edge of the base. The upper edge is located higher than the lower edge and the base is supported by the rods in a sloped fashion.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: September 6, 1994
    Inventors: Chiang M. Chen, Kun M. Chen