Granted Patent
Utility
US 4,286,757 · App. 06/137,041
Method and apparatus for controlling the braking system for an unwinder
Inventor:
Hans-Joachim Wirth
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Apr 3, 1980
Inventor
Hans-Joachim Wirth
Assignee (at issue)
Black Clawson Company, 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.