Granted Patent
Utility
US 5,651,629 · App. 08/634,041
Coupling device for drive shafts
Inventors:
Harry Wall, Nowal Pierson
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Apr 17, 1996
Inventors
Harry Wall
Nowal Pierson
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.