Granted Patent
Utility
US 6,827,285 · App. 10/393,151
Self drilling sensor well for sensing the atmosphere in an enclosure
Inventor:
James D. Head
Patented Case
View Patent ↗
Granted: Dec 7, 2004
Filed: Mar 20, 2003
Inventor
James D. Head
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.