Granted Patent
Utility
US 5,989,341 · App. 08/930,572
Single crystal producing apparatus and a single crystal producing method using same
Inventors:
Munehiro Yasuda, Shinichi Sakurada
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Oct 7, 1997
Inventors
Munehiro Yasuda
Shinichi Sakurada
Assignee (at issue)
Sumitomo Sitix 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.