Granted Patent
Utility
US 5,253,499 · App. 07/896,828
Method for straightening coupling shafts
Inventors:
Kenneth H. Knipp, Margot L. Hoffman
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: Jun 11, 1992
Inventors
Kenneth H. Knipp
Margot L. Hoffman
Assignee (at issue)
DANA LIMITED
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.