Granted Patent
Utility
US 4,530,468 · App. 06/621,846
Reduced fiber insulation nozzle
Inventor:
Henry Sperber
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: Jun 18, 1984
Inventor
Henry Sperber
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.