Granted Patent
Utility
US 6,729,445 · App. 10/347,697
Piston having a cap and a brake caliper for use therewith
Inventors:
Wenqi Qian, Grafton Robertson
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Jan 22, 2003
Inventors
Wenqi Qian
Grafton Robertson
Assignee (at issue)
Performance Friction Corporation
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.