Granted Patent
Utility
US 4,768,280 · App. 07/036,669
Roll forming of metal articles
Inventors:
Ross Leslie Palmer, Leslie Palmer
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: May 13, 1987
Inventors
Ross Leslie Palmer
Leslie Palmer
Assignee (at issue)
Palmer Tube Mills (Aust.) Pty. Ltd.
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.