Granted Patent
Utility
US 6,612,780 · App. 09/987,606
Modular trench drain system
Inventors:
Donald E. Dahowski, James G. Wilson, Allen L. Kinner, Christopher B. Presler, Matthew Schlager
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: Nov 15, 2001
Inventors
Donald E. Dahowski
James G. Wilson
Allen L. Kinner
Christopher B. Presler
Matthew Schlager
Assignee (at issue)
Quaker Plastic Corporation
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.