Granted Patent
Utility
US 5,507,217 · App. 08/316,513
Perforate diaphragm alignment system for spring brake actuators
Inventor:
Ronald S. Plantan
Patented Case
View Patent ↗
Granted: Apr 16, 1996
Filed: Sep 30, 1994
Inventor
Ronald S. Plantan
Assignee (at issue)
INDIAN HEAD INDUSTRIES, 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.