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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 1998 - 2002 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 1998 1999 2000 2001 2002 Total
INTERNATIONAL BUSINESS MACHINES CORPORATION 150 151 161 159 155 776
SONY CORPORATION 96 102 92 73 61 424
SEAGATE TECHNOLOGY, LLC 0 0 25 128 194 347
FUJITSU LIMITED 60 83 79 53 60 335
SEAGATE TECHNOLOGY, INCORPORATED 85 93 117 11 4 310
HITACHI, LTD 35 42 42 50 73 242
SAMSUNG ELECTRONICS CO., LTD. 46 46 57 43 30 222
NEC CORPORATION 27 25 40 28 37 157
READ-RITE CORPORATION 21 20 20 38 44 143
TDK CORPORATION 13 10 24 36 60 143
IOMEGA CORPORATION 11 37 38 36 14 136
TOSHIBA CORPORATION 35 34 34 17 16 136
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 24 26 24 18 29 121
ALPS ELECTRIC CO., LTD. 12 17 20 37 29 115
~Individually Owned Patent 27 18 20 18 20 103
MAXTOR CORPORATION 10 13 14 29 32 98
STORAGE TECHNOLOGY CORPORATION 6 17 21 25 25 94
QUANTUM CORP. (CA) 26 20 25 12 7 90
CANON KABUSHIKI KAISHA 25 21 24 10 7 87
HEWLETT-PACKARD COMPANY 10 13 18 34 9 84
U.S. PHILIPS CORPORATION 21 22 23 13 5 84
MAGNECOMP CORP. 3 10 10 23 36 82
MITSUMI ELECTRIC CO., LTD. 15 17 16 11 18 77
WESTERN DIGITAL CORPORATION 25 18 16 16 0 75
HUTCHINSON TECHNOLOGY INC. 17 23 9 4 7 60
CIRRUS LOGIC, INC. 22 14 14 3 4 57
DAEWOO ELECTRONICS COMPANY, LTD. 29 20 2 2 0 53
MITSUBISHI DENKI KABUSHIKI KAISHA 16 11 15 9 1 52
TEXAS INSTRUMENTS, INCORPORATED 4 3 12 11 17 47
FUJI PHOTO FILM CO., LTD 13 10 5 5 10 43
IMATION CORP. 3 6 12 7 9 37
EXABYTE CORPORATION 6 11 5 7 7 36
VICTOR COMPANY OF JAPAN, LIMITED 11 8 11 4 1 35
WESTERN DIGITAL TECHNOLOGIES, INC. 0 0 0 8 27 35
TEAC CORPORATION 2 7 6 10 7 32
HEADWAY TECHNOLOGIES, INC. 2 3 1 6 13 25
DEUTSCHE THOMSON-BRANDT GMBH 4 6 8 2 2 22
SANYO ELECTRIC CO., LTD. 7 4 2 6 2 21
MINEBEA KABUSHIKI-KAISHA (MINEBEA CO., LTD) 2 8 3 5 1 19
MOBILE STORAGE TECHNOLOGY INC. 0 11 7 1 0 19
LG ELECTRONICS INC. 5 4 4 2 2 17
SHARP KABUSHIKI KAISHA (SHARP CORPORATION) 6 6 3 1 1 17
TANDBERG DATA A/S 2 6 3 3 1 15
CASTLEWOOD SYSTEMS, INC. 0 2 6 4 2 14
FUNAI ELECTRIC CO., LTD. 1 3 6 1 3 14
STMICROELECTRONICS N.V. 0 2 5 4 2 13
STMICROELECTRONICS, INC. 0 1 5 3 4 13
AMPEX CORP. 6 1 5 0 0 12
PAPST LICENSING GMBH & CO. KG 6 3 0 2 1 12
GOLDSTAR COMPANY, LTD. 9 2 0 0 0 11
HITACHI METALS LTD. 5 1 2 2 1 11
SYQUEST TECHNOLOGY 4 1 2 2 2 11
ADAPTEC, INC. 2 1 4 1 2 10
COMMISSARIAT A L'ENERGIE ATOMIQUE 3 3 1 1 2 10
EASTMAN KODAK COMPANY 8 1 1 0 0 10
CENSTOR CORP. 1 2 1 3 2 9
STMICROELECTRONICS S.R.L. 0 0 4 1 4 9
THOMSON-CSF 3 6 0 0 0 9
VTC INCORPORATED 4 4 1 0 0 9
CANON DENSHI KABUSHIKI KAISHA 4 3 1 0 0 8
INTEGRAL PERIPHERALS, INC. 7 1 0 0 0 8
SANKYO SEIKI MFG. CO., LTD. 3 3 0 0 2 8
AGERE SYSTEMS GUARDIAN CORP. 0 0 0 4 3 7
NHK SPRING CO., LTD. 1 0 2 3 1 7
ROHM COMPANY LIMITED 2 2 0 2 1 7
SAMSUNG ELECTRO-MECHANICS CO., LTD. 5 1 0 1 0 7
AIWA CO., LTD. 1 0 2 2 1 6
EMC CORPORATION 0 0 4 2 0 6
GENEVA GROUP OF COMPANIES, INC. 1 2 2 1 0 6
KONINKLIJKE PHILIPS ELECTRONICS N.V. 0 0 0 0 6 6
LSI LOGIC CORPORATION 0 0 3 2 1 6
ONSTREAM INC. 0 1 4 1 0 6
PHASE METRICS, INC. 4 2 0 0 0 6
PIONEER ELECTRONIC CORPORATION 2 2 1 1 0 6
QUESTEK INNOVATIONS, INC. 0 4 1 1 0 6
READ-RITE SMI CORPORATION 1 1 2 0 2 6
SEAGATE REMOVABLE STORAGE SOLUTIONS LLC 0 0 0 3 3 6
YAMAHA CORPORATION 2 4 0 0 0 6
AIWA RESEARCH AND DEVELOPMENT, INC. 4 1 0 0 0 5
GUZIK TECHNICAL ENTERPRISES 2 0 0 2 1 5
HITACHI ELECTRONICS ENGINEERING CO., LTD. 2 2 0 0 1 5
HITACHI MAXELL, LTD. 3 0 2 0 0 5
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, TAIWAN 4 1 0 0 0 5
INTRI-PLEX TECHNOLOGIES, INC. 0 1 2 2 0 5
MEC CO., LTD. 1 0 2 1 1 5


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