Granted Patent
Utility
US 6,597,821 · App. 09/869,120
Fiber laser sensor for measuring differential pressures and flow velocities
Inventors:
Klaus Bohnert, Hubert Brandle
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Jun 25, 2001
Inventors
Klaus Bohnert
Hubert Brandle
Assignee (at issue)
ABB RESEARCH LTD.
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.