Granted Patent
Utility
US 5,660,502 · App. 08/385,355
Adjustment mechanism for a scuba second stage airflow regulator
Inventor:
Arthur R. Ferguson
Patented Case
View Patent ↗
Granted: Aug 26, 1997
Filed: Feb 8, 1995
Inventor
Arthur R. Ferguson
Assignee (at issue)
American Underwater Products
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.