Granted Patent
Utility
US 5,609,438 · App. 08/508,003
Flood barrier and a method for forming a flood barrier
Inventor:
Andrew Liao
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: Jul 27, 1995
Inventor
Andrew Liao
Assignee (at issue)
Baroid Technology, 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.