Granted Patent
Utility
US 4,445,363 · App. 06/349,984
Device for detecting flooding of a hollow structure
Inventors:
Alan Bennett, Derek Allen Brown
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Feb 18, 1982
Inventors
Alan Bennett
Derek Allen Brown
Assignee (at issue)
British Gas
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.