Granted Patent
Utility
US 6,321,492 · App. 09/463,943
Energy absorber
Inventor:
William H. Robinson
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Mar 6, 2000
Inventor
William H. Robinson
Assignee (at issue)
Robinson Seismic IP Limited
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.