Granted Patent
Utility
US 6,726,359 · App. 09/957,769
Apparatus and method of detecting the room temperature by means of sound waves
Inventor:
Yves Lüthi
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Sep 21, 2001
Inventor
Yves Lüthi
Assignee (at issue)
SIEMENS BUILDING TECHNOLOGIES AG
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.