Granted Patent
Utility
US 4,646,502 · App. 06/701,016
Panel construction element and building construction system employing such construction elements
Inventor:
Heini Ziehbrunner
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Feb 12, 1985
Inventor
Heini Ziehbrunner
Assignee (at issue)
Marco Vasella
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.