Granted Patent
Utility
US 5,959,395 · App. 08/727,619
Cathode for electron tube
Inventors:
Hiroshi Sakurai, Yoshiki Hayashida, Masayuki Kubo, Katsuyuki Yamashita
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Oct 18, 1996
Inventors
Hiroshi Sakurai
Yoshiki Hayashida
Masayuki Kubo
Katsuyuki Yamashita
Assignee (at issue)
Matsushita Electronics 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.