Granted Patent
Utility
US 4,335,934 · App. 06/201,943
Single mode fibre and method of making
Inventors:
Philip W. Black, John Irven
Patented Case
View Patent ↗
Granted: Jun 22, 1982
Filed: Oct 29, 1980
Inventors
Philip W. Black
John Irven
Assignee (at issue)
International Standard Electric 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.