Granted Patent
Utility
US 4,362,521 · App. 06/145,077
Power transmission shaft
Inventors:
Alfred Puck, Peter Voirol
Patented Case
View Patent ↗
Granted: Dec 7, 1982
Filed: Apr 30, 1980
Inventors
Alfred Puck
Peter Voirol
Assignee (at issue)
Ciba-Geigy
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.