Granted Patent
Utility
US 5,670,870 · App. 08/488,942
Electric field sensor capable of reliably measuring an electric field intensity of a signal
Inventor:
Ryoji Muramatsu
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Jun 9, 1995
Inventor
Ryoji Muramatsu
Assignee (at issue)
TOKIN 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.