Patents by Inventor Chen Yuan-Hsiang

Chen Yuan-Hsiang 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).

  • Sanitary sandals
    Patent number: 4477985
    Abstract: The sanitary sandals or slippers are made of different kinds of materials with proper flexibility. Especially, they are made of the mixture of paper and porous plastics. The material is molded into the sandals. The vamp and sole of the sandal are made of the same material. Once the material surface is folded back, its main body with the component of shoe strings turn into a solid form, a kind of easily made, economic in use, simple and convenient sandal.
    Type: Grant
    Filed: June 3, 1982
    Date of Patent: October 23, 1984
    Inventor: Chen Yuan-Hsiang