Granted Patent
Utility
US 4,801,419 · App. 06/885,804
Solid phase deformation of thermoplastic tubes
Inventors:
Ian MacMillan Ward, Alan Selwood
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Jul 15, 1986
Inventors
Ian MacMillan Ward
Alan Selwood
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.