Granted Patent
Utility
US 5,299,885 · App. 07/930,345
Stabilized porous pipe
Inventors:
Thomas N. Prassas, Shannon Bard
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: Aug 14, 1992
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.