Granted Patent
Utility
US 6,268,771 · App. 09/523,650
Amplifying device
Inventor:
Katsumi Miyazaki
Patented Case
View Patent ↗
Granted: Jul 31, 2001
Filed: Mar 10, 2000
Inventor
Katsumi Miyazaki
Assignees (at issue)
MITSUBISHI ELECTRIC CORPORATION
MITSUBISHI ELECTRIC ENGINEERING COMPANY, LIMITED
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.