Granted Patent
Utility
US 6,562,505 · App. 09/637,704
Sealing structure of cell tube
Inventors:
Hiroshi Tsukuda, Nagao Hisatome, Yoshiharu Watanabe, Tohru Houjyou
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Aug 15, 2000
Inventors
Hiroshi Tsukuda
Nagao Hisatome
Yoshiharu Watanabe
Tohru Houjyou
Assignee (at issue)
MITSUBISHI ELECTRIC 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.