Granted Patent
Utility
US 6,568,217 · App. 09/946,285
Method for manufacturing fluorescent lamp
Inventors:
Kazuyoshi Sudou, Masahiro Takeuchi, Kazumasa Koyabashi
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Sep 4, 2001
Inventors
Kazuyoshi Sudou
Masahiro Takeuchi
Kazumasa Koyabashi
Assignee (at issue)
SUMITOMO ELECTRIC 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.