Granted Patent
Utility
US 5,856,898 · App. 07/840,276
Spiral coil pattern including same layer spiral patterns suitable for use in a thin film head
Inventor:
Keishi Ohashi
Patented Case
View Patent ↗
Granted: Jan 5, 1999
Filed: Feb 24, 1992
Inventor
Keishi Ohashi
Assignee (at issue)
NEC 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.