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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 370, Multiplex Communications

( 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
NORTEL NETWORKS LIMITED 105 123 152 173 159 712
CISCO TECHNOLOGY, INC. 47 75 143 167 186 618
LUCENT TECHNOLOGIES INC. 82 88 117 137 92 516
TELEFONAKTIEBOLAGET LM ERICSSON 63 91 117 127 100 498
NEC CORPORATION 66 106 102 86 71 431
FUJITSU LIMITED 62 89 92 88 77 408
INTERNATIONAL BUSINESS MACHINES CORPORATION 69 50 77 91 62 349
3COM CORPORATION 65 43 86 76 36 306
MOTOROLA, INC. 60 40 43 64 78 285
AT&T CORP. 43 63 49 58 66 279
SAMSUNG ELECTRONICS CO., LTD. 37 62 65 59 49 272
QUALCOMM, INC. 40 50 45 63 54 252
ALCATEL 32 30 43 68 58 231
HITACHI, LTD 36 34 41 36 37 184
SONY CORPORATION 35 38 38 36 37 184
INTEL CORPORATION 10 22 34 55 57 178
ADVANCED MICRO DEVICES, INC. 22 23 26 55 46 172
SIEMENS AKTIENGESELLSCHAFT 30 18 45 43 33 169
NOKIA CORPORATION 1 5 38 62 62 168
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 20 34 45 31 31 161
~Individually Owned Patent 35 25 23 39 32 154
INTERDIGITAL TECHNOLOGY CORPORATION 11 17 6 42 49 125
TOSHIBA CORPORATION 18 22 28 24 27 119
ERICSSON, INC. 15 25 27 27 20 114
SPRINT COMMUNICATIONS COMPANY L.P. 18 28 19 25 22 112
NOKIA MOBILE PHONES LTD. 19 19 29 30 13 110
KONINKLIJKE PHILIPS ELECTRONICS N.V. 0 21 29 27 21 98
ALCATEL CANADA, INC. 10 21 30 19 9 89
TEXAS INSTRUMENTS, INCORPORATED 11 21 14 19 22 87
SUN MICROSYSTEMS, INC. 10 6 21 21 27 85
BROADCOM CORPORATION 3 6 9 22 36 76
NOKIA TELECOMMUNICATIONS OY 25 23 23 4 1 76
LG INFORMATION & COMMUNICATIONS, LTD. 4 9 20 23 12 68
MITSUBISHI DENKI KABUSHIKI KAISHA 9 14 14 9 20 66
OKI ELECTRIC INDUSTRY CO., LTD. 14 13 14 9 13 63
CANON KABUSHIKI KAISHA 10 12 13 14 13 62
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. 0 0 23 19 20 62
ALCATEL USA SOURCING, L.P. 20 19 10 5 1 55
SIEMENS INFORMATION AND COMMUNICATIONS NETWORKS, INC. 12 16 8 19 0 55
FUJITSU NETWORK COMMUNICATIONS, INC. 10 18 12 7 3 50
AVAYA TECHNOLOGY CORP. 7 12 11 9 7 46
LG ELECTRONICS INC. 1 4 5 15 19 44
AGERE SYSTEMS INC. 0 0 16 16 11 43
MICROSOFT CORPORATION 4 9 4 7 18 42
QWEST COMMUNICATIONS INTERNATIONAL INC. 10 6 10 7 9 42
LSI LOGIC CORPORATION 8 6 6 12 8 40
MCI COMMUNICATIONS CORP. 15 9 4 9 3 40
NOKIA NETWORKS OY 6 5 7 9 13 40
HUGHES ELECTRONICS CORP. 6 9 6 12 6 39
BRITISH TELECOMMUNICATION, PLC 12 10 6 7 3 38
GENESYS TELECOMMUNICATIONS LABORATORIES, INC. 8 13 8 6 3 38
HYUNDAI ELECTRONICS INDUSTRIES CO., LTD. 8 9 10 9 1 37
AGILENT TECHNOLOGIES, INC. 2 5 4 13 12 36
ADTRAN 4 13 9 5 3 34
VERIZON LABORATORIES INC. 11 4 8 4 7 34
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE 8 15 9 0 1 33
CONEXANT SYSTEMS, INC. 7 9 6 7 3 32
HEWLETT-PACKARD COMPANY 15 14 3 0 0 32
MARCONI COMMUNICATIONS, INC. 3 9 8 6 5 31
TELCORDIA TECHNOLOGIES, INC. 1 7 7 4 11 30
UT STARCOM, INC. 1 0 5 5 19 30
CIENA CORPORATION 0 1 3 12 13 29
PMC-SIERRA LTD. 5 7 4 6 6 28
HARRIS CORP. 3 2 3 8 11 27
JUNIPER NETWORKS, INC. 0 1 4 3 19 27
PARADYNE CORPORATION 9 3 6 4 5 27
THOMSON LICENSING S.A. 2 4 4 9 8 27
WORLDCOM, INC. 0 8 9 9 0 26
NORTHROP GRUMMAN CORPORATION 4 0 4 9 8 25
NTT MOBILE COMMUNICATIONS NETWORK INC. 8 3 7 3 4 25
ADC TELECOMMUNICATIONS, INC. 3 8 3 3 7 24
GENERAL INSTRUMENT CORPORATION 3 2 1 9 9 24
CYPRESS SEMICONDUCTOR CORP. 3 3 8 6 3 23
SCIENTIFIC-ATLANTA, INC. 8 3 7 1 4 23
ENTERASYS NETWORKS, INC. 2 6 9 3 2 22
NIPPON TELEGRAPH & TELEPHONE CORP. 8 3 4 4 3 22
ATT WIRELESS SERVICES INC 3 4 2 12 0 21
BELL ATLANTIC NETWORK SERVICES, INC. 15 4 1 0 1 21
TRW INC. 4 12 5 0 0 21
3COM TECHNOLOGIES 6 5 7 0 2 20
COMPAQ COMPUTER CORPORATION, INC. 12 7 1 0 0 20
ROCKWELL COLLINS, INC. 2 2 6 7 3 20
TELLABS OPERATIONS INC. 4 3 4 5 4 20
VERTICAL NETWORKS, INC. 7 9 2 1 1 20
MICRON TECHNOLOGY, INC. 7 2 0 9 1 19
PLURIS, INC. 1 3 6 5 4 19
YAZAKI CORP. 6 5 6 2 0 19
APPLE COMPUTER, INC. 2 2 4 6 4 18
BELLSOUTH INTELLECTUAL PROPERTY CORPORATION 0 3 7 4 4 18
MINDSPEED TECHNOLOGIES, INC. 0 0 0 13 5 18
TRANSWITCH CORPORATION 3 2 6 4 3 18
APPLIED MICRO CIRCUITS CORPORATION 0 2 1 3 11 17
EXTREME NETWORKS, INC. 1 0 2 5 9 17
FRANCE TELECOM 5 1 2 6 3 17
TANTIVY COMMUNICATIONS, INC. 2 4 7 2 2 17
U.S. PHILIPS CORPORATION 12 5 0 0 0 17
ROBERT BOSCH GMBH 5 3 3 3 2 16
SYNCHRODYNE, INC. 4 3 0 7 2 16
EMULEX CORPORATION 8 3 2 2 0 15
REDBACK NETWORKS INC. 0 1 5 2 7 15
VERIZON SERVICES CORP. 0 2 8 2 3 15
AGERE SYSTEMS GUARDIAN CORP. 4 10 0 0 0 14
IPR LICENSING, INC. 0 0 0 2 12 14
MARCONI COMMUNICATIONS LIMITED 5 4 3 2 0 14
NATIONAL SEMICONDUCTOR CORPORATION 3 5 1 3 2 14
NETWORK ASSOCIATES, INC. 1 0 2 9 2 14
NOKIA INC. 0 0 0 3 11 14
NTT DOCOMO, INC. 0 0 2 5 7 14
UNIVERSITY OF CALIFORNIA, THE REGENTS OF 1 1 1 5 6 14
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, TAIWAN 0 2 4 1 6 13
NORTHERN TELECOM LIMITED 5 6 2 0 0 13
SONY INTERNATIONAL (EUROPE) GMBH 0 0 9 2 2 13
ASCEND COMMUNICATIONS, INC. 4 2 4 1 1 12
GLOBESPAN VIRATA, INC. 0 2 3 6 1 12
LEGERITY, INC. 2 4 5 1 0 12
MCDATA CORPORATION 3 0 4 3 2 12
STMICROELECTRONICS, LTD. 0 1 4 5 2 12
TERAYON COMMUNICATION SYSTEMS, INC. 5 4 1 1 1 12
YAMAHA CORPORATION 0 3 2 3 4 12
CISCO SYSTEMS, INC. 4 2 3 1 1 11
HITACHI TELECOM TECHNOLOGIES, LTD. 3 1 1 2 4 11
MCI, INC. 0 0 0 4 7 11
MESHNETWORKS, INC. 0 0 0 7 4 11
NEC USA, INC. 3 5 3 0 0 11
SANYO ELECTRIC CO., LTD. 1 3 5 1 1 11
SBC TECHNOLOGY RESOURCES, INC. 2 3 0 5 1 11
TELECOMMUNICATIONS RESEARCH LABORATORIES 0 4 4 1 2 11
THOMSON-CSF 4 3 4 0 0 11
LOCKHEED MARTIN CORPORATION 4 1 5 0 0 10
MITEL CORPORATION 2 0 4 3 1 10
SHARP KABUSHIKI KAISHA (SHARP CORPORATION) 4 1 0 3 2 10
SYMBOL TECHNOLOGIES, INC. 1 2 4 1 2 10
THE DIRECTV GROUP, INC. 0 0 0 1 9 10
UNITED STATES OF AMERICA, NAVY 1 2 6 1 0 10
VERIZON CORPORATE SERVICES GROUP INC. 0 1 3 4 2 10
ACCTON TECHNOLOGY CORP. 2 5 2 0 0 9
AVICI SYSTEMS, INC. 1 2 3 1 2 9
CIRRUS LOGIC, INC. 2 4 3 0 0 9
DENSO CORPORATION 1 1 2 1 4 9
ECI TELECOM LTD. 0 1 2 4 2 9
EXCEL SWITCHING CORPORATION 2 3 3 0 1 9
INFINEON TECHNOLOGIES AG 1 1 1 1 5 9
KDD CORPORATION 0 0 3 3 3 9
MCI WORLDCOM, INC. 1 8 0 0 0 9
MOSAID TECHNOLOGIES INC. 0 0 3 4 2 9
NEC ELECTRONICS CORPORATION 0 0 2 5 2 9
TACHYON, INC. 0 1 4 3 1 9
ALCATEL INTERNETWORKING (PE), INC. 1 3 3 0 1 8
AMERITECH CORPORATION 2 4 1 1 0 8
BBNT SOLUTIONS LLC 0 1 1 1 5 8
BOEING COMPANY 0 0 1 4 3 8
COVAD COMMUNICATIONS GROUP, INC. 0 2 4 1 1 8
FREESCALE SEMICONDUCTOR, INC. 0 0 0 4 4 8
INTELLON CORPORATION 2 1 3 0 2 8
INTERMEC IP CORP. 0 4 1 0 3 8
ORCKIT COMMUNICATIONS LTD. 0 0 0 7 1 8
PACKETEER, INC. 3 1 0 1 3 8
VERIZON COMMUNICATIONS INC. 0 1 0 4 3 8
AIRSPAN NETWORKS, INC. 5 2 0 0 0 7
FLARION TECHNOLOGIES, INC. 0 1 1 3 2 7
FRANCE TELECOM SA 1 3 2 0 1 7
GENERAL BANDWIDTH INC. 0 2 3 1 1 7
INSTITUTE FOR INFORMATION INDUSTRY 0 3 0 2 2 7
MASSACHUSETTS INSTITUTE OF TECHNOLOGY 2 1 1 1 2 7
NETWORK EQUIPMENT TECHNOLOGIES 0 3 1 3 0 7
POLYTECHNIC UNIVERSITY 0 4 1 0 2 7
SARNOFF CORPORATION & CO., LTD. 2 0 1 3 1 7
SILICON GRAPHICS, INC. 2 0 1 4 0 7
TEKELEC 1 0 0 1 5 7
TEKTRONIX INC. 2 2 1 1 1 7
TELIA AB 1 2 1 2 1 7
TELOGY NETWORKS INC. 1 2 3 1 0 7
VIA TECHNOLOGIES, INC. 0 0 1 1 5 7
ALCATEL USA, INC. 5 1 0 0 0 6
ARRAYCOMM, INC. 0 0 0 4 2 6
ASPECT COMMUNICATIONS CORP. 0 1 2 3 0 6
ASUSTEK COMPUTER INC. 0 0 0 3 3 6
ATHEROS COMMUNICATIONS, INC. 0 0 1 3 2 6
COMPAQ INFORMATION TECHNOLOGIES GROUP, L.P. 0 3 3 0 0 6
COMSAT CORPORATION 0 0 1 2 3 6
DIVA SYSTEMS CORPORATION 2 2 1 1 0 6
ENSEMBLE COMMUNICATIONS, INC. 0 1 0 5 0 6
HONEYWELL INTERNATIONAL INC. 1 2 0 2 1 6
HRL LABORATORIES, LLC 0 1 3 2 0 6
ITT MANUFACTURING ENTERPRISES, INC. 1 3 0 0 2 6
KOKUSAI ELECTRIC CO., LTD. 0 2 0 4 0 6
MARCONI INTELLECTUAL PROPERTY (RINGFENCE), INC. 0 0 0 2 4 6
MERLOT COMMUNICATIONS, INC. 2 0 4 0 0 6
NCR CORPORATION 3 2 0 0 1 6
NET INSIGHT AB 0 1 2 0 3 6
OPENWAVE SYSTEMS INC. 1 0 3 2 0 6
RAYTHEON COMPANY 1 0 1 4 0 6
RIVERSTONE NETWORKS, INC. 0 2 1 3 0 6
SHARP LABORATORIES OF AMERICA, INC. 1 0 0 2 3 6
SIEMENS COMMUNICATIONS, INC. 0 0 0 0 6 6
SKYWORKS SOLUTIONS, INC. 0 2 2 2 0 6
SONY EUROPA B.V. 1 0 0 2 3 6
SPRINT SPECTRUM L.P. 0 0 1 1 4 6
STMICROELECTRONICS, INC. 2 1 0 2 1 6
TRIMBLE NAVIGATION, LTD. 1 1 2 2 0 6
TROPIC NETWORKS INC. 0 0 2 0 4 6
VIASAT, INC. 0 0 2 1 3 6
VLSI TECHNOLOGY, INC. 4 2 0 0 0 6
AIRBIQUITY INC. 1 1 0 2 1 5
ALTIGEN COMMUNICATIONS, INC. 0 0 1 1 3 5
ANRITSU CORPORATION 0 0 1 2 2 5
ARRIS INTERNATIONAL, INC. 0 1 1 0 3 5
AWARE, INC. 1 0 3 1 0 5
CABLETRON SYSTEMS, INC. 5 0 0 0 0 5
CARRIERCOMM, INC. 0 0 1 3 1 5
CELLCO PARTNERSHIP 0 0 2 1 2 5
CENTILLIUM COMMUNICATIONS, INC. 0 2 1 1 1 5
CORRIGENT SYSTEMS LTD. 0 0 0 0 5 5
CROSSROADS SYSTEMS, INC. 1 0 1 0 3 5
DAEWOO ELECTRONICS COMPANY, LTD. 3 2 0 0 0 5
EFFICIENT NETWORKS, INC. 0 0 4 1 0 5
ELECTRONIC DATA SYSTEMS CORPORATION 0 5 0 0 0 5
EMC CORPORATION 0 0 1 1 3 5
FOUNDRY NETWORKS, INC. 0 0 1 3 1 5
GOLDEN BRIDGE TECHNOLOGY, INC. 1 0 2 0 2 5
HARRIS BROADBAND WIRELESS ACCESS, INC. 0 2 2 1 0 5
HITACHI DENSHI KABUSHIKI KAISHA 1 2 2 0 0 5
INFINEON TECHNOLOGIES NORTH AMERICA CORP. 0 1 1 1 2 5
INTERVOICE LIMITED PARTNERSHIP 2 1 1 1 0 5
KOKUSAI DENSHIN DENWA KABUSHIKI KAISHA 2 2 0 0 1 5
KOREA TELECOMMUNICATION AUTHORITY 0 1 0 2 2 5
L-3 COMMUNICATIONS CORPORATION 0 0 1 3 1 5
LEVEL 3 COMMUNICATIONS, INC. 0 1 1 1 2 5
LUMINOUS NETWORKS INC. 0 0 2 2 1 5
MALIBU NETWORKS, INC. 0 1 3 1 0 5
MEDIARING.COM LTD. 1 2 1 1 0 5
MULTI-TECH SYSTEMS, INC. 1 1 3 0 0 5
NET2PHONE, INC. 1 2 0 0 2 5
NETSPEAK CORPORATION 2 2 1 0 0 5
NOKIA INTERNET COMMUNICATIONS INC. 0 0 1 4 0 5
NOKIA IP, INC. 0 0 0 5 0 5
OMNIPOINT CORPORATION 5 0 0 0 0 5
OVERTURE NETWORKS, INC. 0 0 0 4 1 5
PIONEER ELECTRONIC CORPORATION 1 1 2 1 0 5
RICOH COMPANY, LTD. 1 2 1 1 0 5
ROKE MANOR RESEARCH LIMITED 1 1 0 1 2 5
SERCONET LTD. 0 1 0 1 3 5
SHAREWAVE, INC. 0 1 0 1 3 5
STARGUIDE DIGITAL NETWORKS, INC. 3 2 0 0 0 5
TUT SYSTEMS, INC. 1 1 1 2 0 5
UNISYS CORPORATION 1 2 1 0 1 5
VIA TELECOM CO., LTD. 0 0 0 0 5 5
VOCALTEC COMMUNICATIONS LTD. 1 1 1 2 0 5
WATCHGUARD TECHNOLOGIES, INC. 0 0 4 0 1 5
XEROX CORPORATION 0 2 2 1 0 5
XIRCOM WIRELESS, INC. 1 3 1 0 0 5
XYRATEX TECHNOLOGY LIMITED 0 0 1 2 2 5
ZARLINK SEMICONDUCTOR INC. 0 0 1 3 1 5


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