Granted Patent
Utility
US 6,742,759 · App. 10/067,837
Magnet unit for concrete moulds
Inventor:
Kari Vappula
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Feb 8, 2002
Inventor
Kari Vappula
Assignee (at issue)
Addtek Research & Development Oy AB
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.