Patents by Inventor Chow M. Chang

Chow M. 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).

  • Non-knifing plastic adhesive tape for packaging and sealing purpose
    Patent number: 4139669
    Abstract: A hand tearable plastic adhesive tape having transverse striations on the front face thereof with the total thickness of the tape ranging from 0.05 to 0.3 mm, the depth of striations ranging from 0.015 to 0.125 mm, the width of the striations ranging from 0.06 to 0.5 mm, the pitch of striations ranging from 0.06 to 0.5 mm, the pitch of striations ranging from 0.1 to 8 mm with the cross-sectional shape of the striations being V or U like.
    Type: Grant
    Filed: November 9, 1977
    Date of Patent: February 13, 1979
    Inventor: Chow M. Chang