Granted Patent
Utility
US 5,477,807 · App. 08/301,491
Process for producing single crystal of potassium niobate
Inventors:
Kazuhiro Yamada, Shuji Takemura, Hiroshi Mori
Patented Case
View Patent ↗
Granted: Dec 26, 1995
Filed: Sep 7, 1994
Inventors
Kazuhiro Yamada
Shuji Takemura
Hiroshi Mori
Assignee (at issue)
Mitsui Petrochemical 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.