Granted Patent
Utility
US 4,388,093 · App. 06/333,960
Process for producing a glass fiber for light transmission
Inventors:
Takao Kimura, Toru Yamanishi
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Dec 23, 1981
Inventors
Takao Kimura
Toru Yamanishi
Assignees (at issue)
Nippon Telegraph and Telephone Public Corporation
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.