Granted Patent
Utility
US 4,537,652 · App. 06/617,563
Process for preparing single crystal
Inventors:
Akihisa Kawasaki, Kohji Tada, Toshihiro Kotani, Shintaro Miyazawa
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Jun 5, 1984
Inventors
Akihisa Kawasaki
Kohji Tada
Toshihiro Kotani
Shintaro Miyazawa
Assignees (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.