Granted Patent
Utility
US 6,079,290 · App. 09/241,906
Rollator braking device
Inventor:
Charles Li
Patented Case
View Patent ↗
Granted: Jun 27, 2000
Filed: Feb 2, 1999
Inventor
Charles Li
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.