Granted Patent
Utility
US 6,529,665 · App. 09/462,498
Refractive index profile type optical fiber
Inventors:
Tomoyoshi Yamashita, Haruko Miyauchi, Yasushi Kawaharada, Kazuki Nakamura, Norizi Oishi
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: May 22, 2000
Inventors
Tomoyoshi Yamashita
Haruko Miyauchi
Yasushi Kawaharada
Kazuki Nakamura
Norizi Oishi
Assignee (at issue)
MITSUBISHI 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.