Granted Patent
Utility
US 6,670,079 · App. 09/598,222
Photorefractive material
Inventors:
Kenji Kitamura, Yasunori Furukawa, Shunji Takekawa, Myeongkyu Lee, Hideki Hatano, Satoru Tanaka, Takashi Yamaji
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Jun 21, 2000
Inventors
Kenji Kitamura
Yasunori Furukawa
Shunji Takekawa
Myeongkyu Lee
Hideki Hatano
Satoru Tanaka
Takashi Yamaji
Assignees (at issue)
Director General of National Institute for Research in Inorganic Materials
PIONEER 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.