Granted Patent
Utility
US 4,019,039 · App. 05/635,577
Synchroscope simulator
Inventor:
Robert R. Fontaine
Patented Case
View Patent ↗
Granted: Apr 19, 1977
Filed: Nov 28, 1975
Inventor
Robert R. Fontaine
Assignee (at issue)
The Singer Company Limited
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.