Granted Patent
Utility
US 4,822,548 · App. 07/124,913
Method and apparatus for manufacturing a thread-reinforced rubber hose
Inventor:
Jurgen Hempel
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Nov 24, 1987
Inventor
Jurgen Hempel
Assignee (at issue)
Firma Carl Freudenberg
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.