Granted Patent
Utility
US 6,205,639 · App. 09/323,999
Method for making a building board
Inventor:
Darko Pervan
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Jun 2, 1999
Inventor
Darko Pervan
Assignee (at issue)
Valinge Aluminium 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.