Granted Patent
Utility
US 4,992,949 · App. 07/367,622
Color sorting of lumber
Inventor:
Terence Arden
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Jun 16, 1989
Inventor
Terence Arden
Assignee (at issue)
MacMillan Bloedel Limited
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.