Granted Patent
Utility
US 5,947,646 · App. 08/805,729
System for blowing loose-fill insulation
Inventor:
C. E. Butch Lytle
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Feb 25, 1997
Inventor
C. E. Butch Lytle
Assignee (at issue)
Guardian Fiberglass, 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.