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U.S. PATENT AND TRADEMARK OFFICE
Office of Electronic Information Products
Patent Technology Monitoring Division (PTMD)

Patenting In Technology Classes,
Breakout By Organization

Count of 2000 - 2004 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 2000 2001 2002 2003 2004 Total
SEAGATE TECHNOLOGY, LLC 25 128 194 223 270 840
INTERNATIONAL BUSINESS MACHINES CORPORATION 161 159 155 145 122 742
SONY CORPORATION 92 73 61 61 56 343
FUJITSU LIMITED 79 53 60 67 69 328
HITACHI, LTD 42 50 73 73 75 313
TDK CORPORATION 24 36 60 67 44 231
ALPS ELECTRIC CO., LTD. 20 37 29 48 60 194
SAMSUNG ELECTRONICS CO., LTD. 57 43 30 18 37 185
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 24 18 29 36 48 155
MAXTOR CORPORATION 14 29 32 32 41 148
WESTERN DIGITAL TECHNOLOGIES, INC. 0 8 27 47 66 148
NEC CORPORATION 40 28 37 21 18 144
SEAGATE TECHNOLOGY, INCORPORATED 117 11 4 5 1 138
TOSHIBA CORPORATION 34 17 16 20 39 126
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. 0 0 0 31 89 120
IOMEGA CORPORATION 38 36 14 16 15 119
READ-RITE CORPORATION 20 38 44 11 0 113
STORAGE TECHNOLOGY CORPORATION 21 25 25 18 20 109
~Individually Owned Patent 20 18 20 15 15 88
TEXAS INSTRUMENTS, INCORPORATED 12 11 17 20 27 87
MAGNECOMP CORP. 10 23 36 2 7 78
MITSUMI ELECTRIC CO., LTD. 16 11 18 15 16 76
QUANTUM CORP. (CA) 25 12 7 12 15 71
FUJI PHOTO FILM CO., LTD 5 5 10 21 28 69
HEWLETT-PACKARD COMPANY 18 34 9 4 0 65
CANON KABUSHIKI KAISHA 24 10 7 7 8 56
IMATION CORP. 12 7 9 10 12 50
HEADWAY TECHNOLOGIES, INC. 1 6 13 10 11 41
U.S. PHILIPS CORPORATION 23 13 5 0 0 41
HUTCHINSON TECHNOLOGY INC. 9 4 7 6 9 35
WESTERN DIGITAL CORPORATION 16 17 0 0 1 34
CIRRUS LOGIC, INC. 14 3 4 6 5 32
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. 0 0 0 11 20 31
MITSUBISHI DENKI KABUSHIKI KAISHA 15 9 1 6 0 31
WESTERN DIGITAL (FREMONT), INC. 0 0 0 1 29 30
EXABYTE CORPORATION 5 7 7 3 4 26
STMICROELECTRONICS, INC. 5 3 4 9 5 26
TEAC CORPORATION 6 10 7 3 0 26
NHK SPRING CO., LTD. 2 3 1 8 10 24
SAE MAGNETICS (H.K.) LTD. 1 0 0 6 16 23
VICTOR COMPANY OF JAPAN, LIMITED 11 4 1 2 4 22
MINEBEA KABUSHIKI-KAISHA (MINEBEA CO., LTD) 3 5 1 7 4 20
FUNAI ELECTRIC CO., LTD. 6 1 3 5 4 19
STMICROELECTRONICS S.R.L. 4 1 4 5 5 19
KONINKLIJKE PHILIPS ELECTRONICS N.V. 0 0 6 9 2 17
AGERE SYSTEMS INC. 0 0 1 7 7 15
INFINEON TECHNOLOGIES AG 0 0 0 5 8 13
CASTLEWOOD SYSTEMS, INC. 6 4 2 0 0 12
DEUTSCHE THOMSON-BRANDT GMBH 8 2 2 0 0 12
HITACHI GLOBAL STORAGE TECHNOLOGIES 0 0 0 4 8 12
SANYO ELECTRIC CO., LTD. 2 6 2 1 1 12
HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. 0 0 0 0 11 11
SEAGATE REMOVABLE STORAGE SOLUTIONS LLC 0 3 3 3 2 11
STMICROELECTRONICS N.V. 5 4 2 0 0 11
INFINEON TECHNOLOGIES NORTH AMERICA CORP. 0 0 1 6 2 9
LG ELECTRONICS INC. 4 2 2 0 1 9
MOBILE STORAGE TECHNOLOGY INC. 7 1 0 1 0 9
READ-RITE SMI CORPORATION 2 0 2 4 1 9
SANKYO SEIKI MFG. CO., LTD. 0 0 2 4 3 9
TANDBERG DATA A/S 3 3 1 0 2 9
CENSTOR CORP. 1 3 2 2 0 8
MARVELL INTERNATIONAL LTD. 0 0 1 3 4 8
NIDEC CORPORATION 0 1 2 3 2 8
SHARP KABUSHIKI KAISHA (SHARP CORPORATION) 3 1 1 2 1 8
ADAPTEC, INC. 4 1 2 0 0 7
AGERE SYSTEMS GUARDIAN CORP. 0 4 3 0 0 7
EMC CORPORATION 4 2 0 1 0 7
KOMAG, INC. 0 0 3 2 2 7
LSI LOGIC CORPORATION 3 2 1 0 1 7
AIWA CO., LTD. 2 2 1 1 0 6
GUZIK TECHNICAL ENTERPRISES 0 2 1 1 2 6
HITACHI METALS LTD. 2 2 1 1 0 6
ORION ELECTRIC CO., LTD. 0 0 0 2 4 6
SYQUEST TECHNOLOGY 2 2 2 0 0 6
3M INNOVATIVE PROPERTIES COMPANY 0 2 2 0 1 5
AMPEX CORP. 5 0 0 0 0 5
DCARD, INC. 0 1 1 1 2 5
FUJI ELECTRIC CO., LTD. 0 0 0 0 5 5
HITACHI MAXELL, LTD. 2 0 0 1 2 5
JPMORGAN CHASE BANK 0 0 0 0 5 5
ONSTREAM INC. 4 1 0 0 0 5
PIONEER CORPORATION 0 0 0 0 5 5
THOMSON LICENSING S.A. 0 0 3 2 0 5


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U.S. Patent and Trademark Office
Office of Electronic Information Products - PTMD
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Alexandria VA 22313-1450

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

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