Granted Patent
Utility
US 4,733,881 · App. 07/042,280
Bicycle frame with supplemental step or platform for performing freestyle maneuvers
Inventor:
Clifford F. Mueller
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Apr 23, 1987
Inventor
Clifford F. Mueller
Assignee (at issue)
Schwinn Bicycle Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.