Granted Patent
Utility
US 4,620,862 · App. 06/703,793
Process of fabricating an elongated glass body particularly a preform for optical waveguides
Inventors:
Raimund Dorn, Armin Baumgartner
Patented Case
View Patent ↗
Granted: Nov 4, 1986
Filed: Feb 21, 1985
Inventors
Raimund Dorn
Armin Baumgartner
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.