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U.S. PATENT AND TRADEMARK OFFICE
Electronic Information Products Division
Patent Technology Monitoring Branch (PTMB)

Patenting In Technology Classes,
Breakout By Organization

Count of 2001 - 2005 Utility Patent Grants,
By Calendar Year of Grant
With Patent Counts Based on Primary Patent Classification

- Explanation of Data -

Rank Ordered Listing of Organizations Receiving 5 or More Utility Patents During the Period
Having Primary Classification In

Class 360, Dynamic Magnetic Information Storage or Retrieval

( technology class is determined by the primary classification assigned to the patent- see 'Explanation of Data' )
( patent ownership is determined by the first-named assignee listed on a patent )

The following table displays first-named assignees and counts of their associated patents, as distributed by the year of patent grant
First-Named Assignee 2001 2002 2003 2004 2005 Total
SEAGATE TECHNOLOGY, LLC 128 194 224 270 141 957
INTERNATIONAL BUSINESS MACHINES CORPORATION 159 155 145 122 73 654
HITACHI, LTD 50 73 73 74 52 322
FUJITSU LIMITED 53 60 67 69 47 296
SONY CORPORATION 73 61 61 56 30 281
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. 0 0 31 89 125 245
WESTERN DIGITAL TECHNOLOGIES, INC. 8 27 47 66 89 237
TDK CORPORATION 36 59 67 44 29 235
ALPS ELECTRIC CO., LTD. 37 29 48 59 39 212
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 18 29 36 47 39 169
MAXTOR CORPORATION 29 32 32 41 32 166
SAMSUNG ELECTRONICS CO., LTD. 43 30 18 37 31 159
TOSHIBA CORPORATION 17 18 20 39 44 138
NEC CORPORATION 27 37 21 18 6 109
STORAGE TECHNOLOGY CORPORATION 25 25 18 20 20 108
FUJI PHOTO FILM CO., LTD 5 10 21 27 43 106
READ-RITE CORPORATION 38 44 11 0 0 93
IOMEGA CORPORATION 36 14 16 15 4 85
TEXAS INSTRUMENTS, INCORPORATED 11 17 20 27 9 84
MAGNECOMP CORP. 23 36 2 7 7 75
~Individually Owned Patent 18 20 15 15 7 75
MITSUMI ELECTRIC CO., LTD. 11 18 15 16 11 71
HEADWAY TECHNOLOGIES, INC. 6 12 10 11 27 66
QUANTUM CORP. (CA) 12 7 12 15 10 56
WESTERN DIGITAL (FREMONT), INC. 0 0 1 29 23 53
HEWLETT-PACKARD COMPANY 34 9 4 0 0 47
IMATION CORP. 7 9 10 12 8 46
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. 0 0 11 20 12 43
HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. 0 0 0 11 27 38
SAE MAGNETICS (H.K.) LTD. 0 0 6 16 12 34
CANON KABUSHIKI KAISHA 10 7 7 7 1 32
NHK SPRING CO., LTD. 3 1 8 10 10 32
HUTCHINSON TECHNOLOGY INC. 4 7 6 9 4 30
STMICROELECTRONICS, INC. 3 4 9 5 3 24
EXABYTE CORPORATION 7 7 3 4 1 22
SEAGATE TECHNOLOGY, INCORPORATED 11 4 5 1 1 22
KONINKLIJKE PHILIPS ELECTRONICS N.V. 0 6 9 2 3 20
MINEBEA KABUSHIKI-KAISHA (MINEBEA CO., LTD) 5 1 7 4 3 20
STMICROELECTRONICS S.R.L. 1 4 5 5 5 20
TEAC CORPORATION 10 7 3 0 0 20
CIRRUS LOGIC, INC. 3 4 6 5 0 18
U.S. PHILIPS CORPORATION 13 5 0 0 0 18
WESTERN DIGITAL CORPORATION 17 0 0 1 0 18
AGERE SYSTEMS INC. 0 1 7 7 2 17
FUNAI ELECTRIC CO., LTD. 1 3 5 4 4 17
MITSUBISHI DENKI KABUSHIKI KAISHA 9 1 6 0 0 16
HITACHI GLOBAL STORAGE TECHNOLOGIES 0 0 4 8 2 14
MARVELL INTERNATIONAL LTD. 0 2 3 4 5 14
INFINEON TECHNOLOGIES AG 0 0 5 8 0 13
VICTOR COMPANY OF JAPAN, LIMITED 4 1 2 4 2 13
SANYO ELECTRIC CO., LTD. 6 2 1 1 1 11
SEAGATE REMOVABLE STORAGE SOLUTIONS LLC 3 3 3 2 0 11
INFINEON TECHNOLOGIES NORTH AMERICA CORP. 0 1 6 2 1 10
NIDEC CORPORATION 1 2 3 2 2 10
PIONEER CORPORATION 0 0 0 5 5 10
SANKYO SEIKI MFG. CO., LTD. 0 2 4 3 1 10
TANDBERG DATA A/S 3 1 0 2 3 9
KOMAG, INC. 0 3 2 2 1 8
THOMSON LICENSING S.A. 0 3 2 0 3 8
AGERE SYSTEMS GUARDIAN CORP. 4 3 0 0 0 7
CENSTOR CORP. 3 2 2 0 0 7
FUJI ELECTRIC CO., LTD. 0 0 0 5 2 7
ORION ELECTRIC CO., LTD. 0 0 2 4 1 7
READ-RITE SMI CORPORATION 0 2 4 1 0 7
3M INNOVATIVE PROPERTIES COMPANY 2 2 0 1 1 6
CASTLEWOOD SYSTEMS, INC. 4 2 0 0 0 6
DCARD, INC. 1 1 1 2 1 6
GUZIK TECHNICAL ENTERPRISES 2 1 1 2 0 6
LG ELECTRONICS INC. 2 2 0 1 1 6
RENESAS TECHNOLOGY CORPORATION 0 0 0 3 3 6
SHARP KABUSHIKI KAISHA (SHARP CORPORATION) 1 1 2 1 1 6
STMICROELECTRONICS N.V. 4 2 0 0 0 6
DATA STORAGE INSTITUTE 1 1 2 1 0 5
JPMORGAN CHASE BANK 0 0 0 5 0 5
LSI LOGIC CORPORATION 2 1 0 1 1 5
NITTO DENKO CORPORATION 1 1 2 0 1 5
ROHM COMPANY LIMITED 2 1 0 1 1 5


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Questions regarding these reports should be directed to:

U.S. Patent and Trademark Office
Electronic Information Products Division - PTMB
MDW 4C18; P.O Box 1450
Alexandria VA 22313-1450

tel: (571) 272-5600
fax: (571) 273-0110
email: oeip@uspto.gov

address of PTMB pages at the USPTO Web Site: http://www.uspto.gov/web/offices/ac/ido/oeip/taf/tafp.html
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