Granted Patent
Utility
US 4,231,774 · App. 05/894,792
Method of fabricating large optical preforms
Inventor:
Mokhtar S. Maklad
Patented Case
View Patent ↗
Granted: Nov 4, 1980
Filed: Apr 10, 1978
Inventor
Mokhtar S. Maklad
Assignee (at issue)
International Telephone and Telegraph 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.