Granted Patent
Utility
US 4,641,469 · App. 06/756,787
Prefabricated insulating panels
Inventor:
Edward F. Wood
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Jul 18, 1985
Inventor
Edward F. Wood
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.