Granted Patent
Utility
US 5,660,503 · App. 08/586,938
Light weight scuba with buoyancy control
Inventor:
R. David Lewis
Patented Case
View Patent ↗
Granted: Aug 26, 1997
Filed: Jan 11, 1996
Inventor
R. David Lewis
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.