Granted Patent
Utility
US 4,422,569 · App. 06/234,265
Forming metal articles
Inventors:
Dennis J. Payne, Martin H. Mansbridge, John K. Norton, Sidney J. Swadling
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Feb 13, 1981
Inventors
Dennis J. Payne
Martin H. Mansbridge
John K. Norton
Sidney J. Swadling
Assignee (at issue)
British Aerospace Public Limited Co.
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.