IP Library › Granted Patent US 6,657,823
Granted Patent Utility
US 6,657,823 · Confirmation No. 7595

DIFFERENTIAL DETECTION READ SENSOR, THIN FILM HEAD FOR PERPENDICULAR MAGNETIC RECORDING AND PERPENDICULAR MAGNETIC RECORDING APPARATUS

Inventor: Yoshiaki Kawato
Patented Case View Patent ↗ View Publication ↗
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 Code Description Pages PDF
2009-06-29 EBCC.AD Notice of Change of Address Place in File Wrapper Due to Electronic Business Center(EBC) Customer Number Update 1 View
2009-06-26 EBCC.AD Notice of Change of Address Place in File Wrapper Due to Electronic Business Center(EBC) Customer Number Update 1 View
2003-09-30 IFEE Issue Fee Payment (PTO-85B) 1 View
2001-08-30 TRNA Transmittal of New Application 1 View
2001-08-30 A.PE Preliminary Amendment 3 View
2001-08-30 SPEC Specification 27 View
2001-08-30 CLM Claims 4 View
2001-08-30 ABST Abstract 1 View
2001-08-30 DRW Drawings-only black and white line drawings 13 View
2001-08-30 OATH Oath or Declaration filed 3 View
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Quick Facts
Patent No.
US 6,657,823
App. No.
09/941,795
Filed
2001-08-30
Granted
2003-12-02
Pub. No.
US20020075608A1
Art Unit
2653
PTA
0 days