Granted Patent
Utility
US 6,542,007 · App. 09/990,573
Inverter circuit
Inventor:
Hirokazu Yoshizawa
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Nov 21, 2001
Inventor
Hirokazu Yoshizawa
Assignee (at issue)
SEIKO INSTRUMENTS 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.