Granted Patent
Utility
US 4,104,629 · App. 05/714,211
Marine radar interrogator-transponder target detection, identification, and range measurement system
Inventors:
Eric J. Isbister, Horace E. Fidler
Patented Case
View Patent ↗
Granted: Aug 1, 1978
Filed: Aug 13, 1976
Inventors
Eric J. Isbister
Horace E. Fidler
Assignee (at issue)
Sperry Rand 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.