Granted Patent
Utility
US 6,814,942 · App. 09/751,087
Oxygen-containing gas blowing devices
Inventors:
Takeo Shinoda, Toru Takashina, Masakazu Onizuka
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: Dec 29, 2000
Inventors
Takeo Shinoda
Toru Takashina
Masakazu Onizuka
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.