Granted Patent
Utility
US 4,569,983 · App. 06/564,371
Polymer materials
Inventors:
Giancarlo Capaccio, Ian MacMillan Ward
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Dec 23, 1983
Inventors
Giancarlo Capaccio
Ian MacMillan Ward
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.