Granted Patent
Utility
US 4,239,092 · App. 05/937,069
Adjustable tensioner
Inventor:
Gunnar H. Janson
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Aug 28, 1978
Inventor
Gunnar H. Janson
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.