Patents Assigned to Allen S. P. Wang
  • 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