Patents by Inventor Pei-Sheng Chang

Pei-Sheng Chang 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).

  • Patent number: 5499881
    Abstract: A writing implement with correction function including: a barrel; an adjusting member threadedly engaged with an upper end of the barrel; a head member snug-fitted with a lower end of the barrel; a plug snug-fitted with a lower end of the head member; a reservoir tube inserted into the barrel, having an upper end fixedly connected with the adjusting member, and kept in place between the adjusting member and the plug; and correction fluid filled into the barrel, whereby the implement can be used for writing as well as correcting what is wrong.
    Type: Grant
    Filed: April 5, 1994
    Date of Patent: March 19, 1996
    Inventor: Pei-Sheng Chang