Granted Patent
Utility
US 4,567,215 · App. 06/709,639
Product and process relating to hardboard
Inventor:
Fred L. Jackson
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: Mar 8, 1985
Inventor
Fred L. Jackson
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.