Granted Patent
Utility
US 6,680,778 · App. 10/007,080
Gas leak detector
Inventors:
Michele Hinnrichs, Robert Hinnrichs
Patented Case
View Patent ↗
Granted: Jan 20, 2004
Filed: Nov 8, 2001
Inventors
Michele Hinnrichs
Robert Hinnrichs
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.