Granted Patent
Utility
US 4,342,610 · App. 06/198,411
Method for intermittently slitting and folding fibrous insulation
Inventor:
Richard J. Ray
Patented Case
View Patent ↗
Granted: Aug 3, 1982
Filed: Oct 20, 1980
Inventor
Richard J. Ray
Assignee (at issue)
Manville Service Corporation
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.