Granted Patent
Utility
US 4,882,678 · App. 07/003,085
Data sensing and processing device for scuba divers
Inventors:
Robert R. Hollis, John E. Lewis, Marvin Ackerman
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Jan 14, 1987
Inventors
Robert R. Hollis
John E. Lewis
Marvin Ackerman
Assignee (at issue)
Oceanic USA
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.