Granted Patent
Utility
US 5,474,398 · App. 08/178,313
Stabilized porous pipe
Inventors:
Thomas N. Prassas, Shannon Bard
Patented Case
View Patent ↗
Granted: Dec 12, 1995
Filed: Jan 10, 1994
Inventors
Thomas N. Prassas
Shannon Bard
Assignee (at issue)
Aquapore Moisture Systems,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.