Granted Patent
Utility
US 5,657,840 · App. 08/528,598
Method and apparatus for absorbing mechanical shock
Inventor:
Magnus B. Lizell
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Sep 15, 1995
Inventor
Magnus B. Lizell
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.