Granted Patent
Utility
US 5,147,718 · App. 07/513,693
Radar absorber
Inventors:
Sotiri A. Papoulias, Henry Seiwatz
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Apr 24, 1990
Inventors
Sotiri A. Papoulias
Henry Seiwatz
Assignee (at issue)
ISP INVESTMENTS LLC
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.