Granted Patent
Utility
US 4,356,045 · App. 06/154,916
Complete production line of wood I-joist manufacturing apparatus the method of manufacture, and the I-joist product, having lumber chords and a plywood web
Inventors:
William J. Elford, Donald E. Williams, III, Keith H. Miller
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: May 30, 1980
Inventors
William J. Elford
Donald E. Williams, III
Keith H. Miller
Assignee (at issue)
St. Regis Paper Company
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.