Granted Patent
Utility
US 6,807,856 · App. 10/446,340
Variable buoyancy profiling device
Inventor:
Douglas C. Webb
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: May 28, 2003
Inventor
Douglas C. Webb
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.