Granted Patent
Utility
US 6,201,912 · App. 09/434,225
Birefringent fiber grating sensor and detection system
Inventors:
Lothar U. Kempen, John D. Prohaska, Robert A. Lieberman
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Nov 5, 1999
Inventors
Lothar U. Kempen
John D. Prohaska
Robert A. Lieberman
Assignee (at issue)
PHYSICAL OPTICS 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.