Granted Patent
Utility
US 6,797,949 · App. 10/288,450
Mass spectrometer
Inventors:
Yuichiro Hashimoto, Hideki Hasegawa, Takashi Baba, Akihiko Okumura, Izumi Waki
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Nov 6, 2002
Inventors
Yuichiro Hashimoto
Hideki Hasegawa
Takashi Baba
Akihiko Okumura
Izumi Waki
Assignee (at issue)
Hitachi High-Technologies 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.