Patents by Inventor Chun-Chien Yen

Chun-Chien Yen 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).

  • Tubular shock-absorbing device for a rail
    Patent number: 5195727
    Abstract: A tubular shock-absorbing device including a post, a block having a curved surface for engagement with the post and having a waved surface, both ends of the block having reinforcing flanges which are cast into form integrally, a curb which has a waved shape being engaged with the waved surface of the block, and a bolt fixing the curb and the block and the post together, so that the block forms a buffer.
    Type: Grant
    Filed: March 18, 1992
    Date of Patent: March 23, 1993
    Inventors: Wan-ming Liao, Chun-Chien Yen