Granted Patent
Utility
US 4,839,657 · App. 07/065,244
System for recording and reproducing radar signal information
Inventors:
Rene J. Chikhani, Frank Weber
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Jun 19, 1987
Inventors
Rene J. Chikhani
Frank Weber
Assignee (at issue)
Ampex 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.