Granted Patent
Utility
US 6,345,538 · App. 09/292,614
Dual chamber ultrasonic flow meter with membranes having equal pressure on opposite sides thereof
Inventors:
Erik Krahbichler, Lars Wallen, Goran Skog
Patented Case
View Patent ↗
Granted: Feb 12, 2002
Filed: Apr 15, 1999
Inventors
Erik Krahbichler
Lars Wallen
Goran Skog
Assignee (at issue)
Siemens Elema AB
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.