Granted Patent
Utility
US 4,553,647 · App. 06/597,146
Wheel cylinder and torque plate construction
Inventor:
Robert Spaargaren
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Apr 5, 1984
Inventor
Robert Spaargaren
Assignee (at issue)
ALLIED CONSULTING, INC.
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.