Granted Patent
Utility
US 4,509,621 · App. 06/407,917
Variable-load energy absorber and method for making energy absorbers having variable-load capability
Inventors:
Stanley P. Desjardins, James C. Warrick
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Aug 13, 1982
Inventors
Stanley P. Desjardins
James C. Warrick
Assignee (at issue)
Simula, Inc.
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.