Granted Patent
Utility
US 6,687,089 · App. 09/988,437
Thin film magnetic head with base coat and small pole-tip recess
Inventors:
Hiromu Chiba, Kenji Furusawa, Toshio Tamura, Yuji Ochiai
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Nov 20, 2001
Inventors
Hiromu Chiba
Kenji Furusawa
Toshio Tamura
Yuji Ochiai
Assignee (at issue)
HITACHI, LTD.
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.