Granted Patent
Utility
US 5,012,248 · App. 07/035,280
Radar absorption material thickness testing device
Inventors:
John R. Munro, William R. Jost, Francis M. Ash, Jr.
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Apr 3, 1987
Inventors
John R. Munro
William R. Jost
Francis M. Ash, Jr.
Assignee (at issue)
Lockheed Corporation
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.