Granted Patent
Utility
US 5,189,920 · App. 07/672,833
Corner stability testing apparatus
Inventor:
Rosendo Martinez
Patented Case
View Patent ↗
Granted: Mar 2, 1993
Filed: Mar 21, 1991
Inventor
Rosendo Martinez
Assignee (at issue)
Electronics & Space Corp.
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.