Patents by Inventor Allen S. P. Wang

Allen S. P. Wang 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).

  • Ridable multi-functional wheelchair assembly
    Patent number: 4830388
    Abstract: A ridable multi-functional wheelchair assembly, aside from being used as a general wheelchair, may be converted into a pedicab by connecting a rear wheel thereto; the pedicab may be further converted into a tread wheel by suspending the rear wheel from the ground or floor with an U-shaped supporter.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: May 16, 1989
    Assignee: Allen S. P. Wang
    Inventor: Allen S. P. Wang