Granted Patent
Utility
US 5,676,036 · App. 08/727,793
Small envelope tamper-resistant spring brake actuator
Inventor:
Graydon J. Choinski
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Oct 7, 1996
Inventor
Graydon J. Choinski
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.