Granted Patent
Utility
US 5,483,932 · App. 08/230,642
Hollow balance shaft
Inventors:
Ronald S. Friedman, William C. Sisco
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Apr 21, 1994
Inventors
Ronald S. Friedman
William C. Sisco
Assignee (at issue)
Simpson 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.