Granted Patent
Utility
US 6,091,443 · App. 08/812,442
Underwater viewing system
Inventors:
Randolph K. Ford, Michael G. Blowers
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Mar 6, 1997
Inventors
Randolph K. Ford
Michael G. Blowers
Assignee (at issue)
Walker Downriggers, Inc.
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.