Granted Patent
Utility
US 4,969,017 · App. 07/359,600
Measuring device for the measurement, in a wide range, of a non-reciprocal phase shift generated in a ring interferometer, and measuring method
Inventors:
Herve Lefevre, Marc Turpin
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Jun 1, 1989
Inventors
Herve Lefevre
Marc Turpin
Assignee (at issue)
Thomson-CSF
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.