Granted Patent
Utility
US 6,401,413 · App. 09/609,189
Concrete form wall building system
Inventor:
Michael Niemann
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Jun 30, 2000
Inventor
Michael Niemann
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.