Granted Patent
Utility
US 6,287,050 · App. 09/386,791
Foundation flood gate with ventilation
Inventors:
Martin J. Montgomery, E. Carl Sprengle, Sr.
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Aug 31, 1999
Inventors
Martin J. Montgomery
E. Carl Sprengle, Sr.
Assignee (at issue)
Smart Vent, 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.