Granted Patent
Utility
US 4,840,359 · App. 07/181,558
Encapsulated rubber cushion
Inventors:
Arno Hamaekers, Axel Rudolph
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Apr 14, 1988
Inventors
Arno Hamaekers
Axel Rudolph
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.