Granted Patent
Utility
US 5,757,115 · App. 08/455,998
Cathode member and electron tube having the cathode member mounted thereon
Inventors:
Maki Narita, Toshikazu Sugimura, Hiroyuki Sakatani, Tsuyoshi Tanabe
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: May 31, 1995
Inventors
Maki Narita
Toshikazu Sugimura
Hiroyuki Sakatani
Tsuyoshi Tanabe
Assignee (at issue)
NEC 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.