Granted Patent
Utility
US 4,557,093 · App. 06/579,195
Insulated building block
Inventor:
Jean-Louis Beliveau
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Feb 10, 1984
Inventor
Jean-Louis Beliveau
Assignee (at issue)
EPSM Inc.
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.