Granted Patent
Utility
US 4,863,353 · App. 07/121,539
Attaching arrangement
Inventor:
Heikki Manninen
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Nov 17, 1987
Inventor
Heikki Manninen
Assignee (at issue)
A. Ahlstrom Corporation
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.