Granted Patent
Utility
US 5,337,142 · App. 07/910,840
Optical fiber measuring device using phase difference
Inventors:
Herve Lefevre, Philippe Martin
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Jul 7, 1992
Inventors
Herve Lefevre
Philippe Martin
Assignee (at issue)
Photonetics
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.