Granted Patent
Utility
US 4,240,849 · App. 05/916,062
Polymer optical circuit with optical lead-fibers and method of fabricating the same
Inventors:
Takashi Kurokawa, Norio Takato, Shigeru Oikawa, Yuzo Katayama
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Jun 16, 1978
Inventors
Takashi Kurokawa
Norio Takato
Shigeru Oikawa
Yuzo Katayama
Assignee (at issue)
Nippon Telegraph and Telephone Public 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.