Granted Patent
Utility
US 4,763,413 · App. 07/022,495
Chain tube cutter
Inventor:
Gunter Rothenberger
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Mar 4, 1987
Inventor
Gunter Rothenberger
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.