Granted Patent
Utility
US 5,446,461 · App. 08/234,211
Concrete penetrating imaging radar
Inventor:
Lawrence M. Frazier
Patented Case
View Patent ↗
Granted: Aug 29, 1995
Filed: Apr 28, 1994
Inventor
Lawrence M. Frazier
Assignee (at issue)
Hughes Missile Systems Company
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.