Granted Patent
Utility
US 6,296,467 · App. 09/250,265
Vibrating screed for surfacing concrete
Inventor:
Roger Rouillard
Patented Case
View Patent ↗
Granted: Oct 2, 2001
Filed: Feb 16, 1999
Inventor
Roger Rouillard
Assignee (at issue)
Les Betons Roger Rouillard 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.