IP Library › Granted Patent US 6,507,457
Granted Patent Utility
US 6,507,457 · App. 09/923,981

Magnetic head

Inventors: Qing He, Song S. Xue, Bryan K. Oliver, Patrick J. Ryan
Patented Case View Patent ↗
Granted: Jan 14, 2003 Filed: Aug 7, 2001
Inventors
Qing He
Song S. Xue
Bryan K. Oliver
Patrick J. Ryan

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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 6,507,457
App. No.
09/923,981
Filed
2001-08-07
Granted
2003-01-14
Kind
B2