Granted Patent
Utility
US 6,670,844 · App. 10/237,714
Charge pump circuit
Inventors:
Fumikazu Kobayashi, Shuuji Sakamoto, Toshiaki Matsubara
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Sep 4, 2002
Inventors
Fumikazu Kobayashi
Shuuji Sakamoto
Toshiaki Matsubara
Assignee (at issue)
Nippon Precision Circuits Inc.
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.