Granted Patent
Utility
US 6,129,482 · App. 09/183,111
Reversible interlocking field drain panel
Inventor:
Robert J. DiTullio
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: Oct 30, 1998
Inventor
Robert J. DiTullio
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.