Granted Patent
Utility
US 4,467,571 · App. 06/272,139
Construction units and assemblies, and structures fabricated from such units and assemblies
Inventor:
William F. Logan
Patented Case
View Patent ↗
Granted: Aug 28, 1984
Filed: Jun 10, 1981
Inventor
William F. Logan
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.