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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 398, Optical 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 2000 2001 2002 2003 2004 Total
LUCENT TECHNOLOGIES INC. 32 24 19 45 29 149
FUJITSU LIMITED 17 27 33 26 21 124
NEC CORPORATION 27 26 23 23 14 113
NORTEL NETWORKS LIMITED 16 13 15 17 32 93
ALCATEL 12 20 21 13 24 90
~Individually Owned Patent 6 7 10 10 9 42
CIENA CORPORATION 7 10 8 8 4 37
HITACHI, LTD 2 6 6 8 10 32
AT&T CORP. 6 1 5 10 9 31
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 1 1 6 10 9 27
SAMSUNG ELECTRONICS CO., LTD. 4 6 4 4 5 23
INTERNATIONAL BUSINESS MACHINES CORPORATION 2 4 7 4 4 21
SIEMENS AKTIENGESELLSCHAFT 3 2 3 4 8 20
AGILENT TECHNOLOGIES, INC. 0 3 4 6 6 19
BRITISH TELECOMMUNICATION, PLC 5 7 5 1 1 19
CORVIS CORPORATION 1 3 2 7 5 18
TELEFONAKTIEBOLAGET LM ERICSSON 8 1 2 6 1 18
SONY CORPORATION 2 5 3 6 1 17
UNIVERSITY OF CALIFORNIA, THE REGENTS OF 1 0 1 6 9 17
SCIENTIFIC-ATLANTA, INC. 0 1 9 3 3 16
CORNING INCORPORATED 2 1 5 5 2 15
MCI COMMUNICATIONS CORP. 8 5 1 0 0 14
NIPPON TELEGRAPH & TELEPHONE CORP. 1 1 2 4 5 13
OKI ELECTRIC INDUSTRY CO., LTD. 5 2 1 3 2 13
MASSACHUSETTS INSTITUTE OF TECHNOLOGY 0 2 3 5 2 12
TRW INC. 2 2 6 2 0 12
TYCOM (US) INC. 0 4 8 0 0 12
AVANEX CORPORATION 0 2 3 2 4 11
CANON KABUSHIKI KAISHA 3 3 2 3 0 11
NORTHROP GRUMMAN CORPORATION 1 0 1 5 4 11
TOSHIBA CORPORATION 4 1 3 1 2 11
UNITED STATES OF AMERICA, NAVY 4 0 4 1 2 11
WORLDCOM, INC. 0 0 4 4 3 11
CHORUM TECHNOLOGIES LP 0 3 3 4 0 10
KOKUSAI DENSHIN DENWA KABUSHIKI KAISHA 2 7 1 0 0 10
MARCONI COMMUNICATIONS LIMITED 0 3 3 3 1 10
CISCO PHOTONICS ITALY, S.R.L. 0 1 3 4 1 9
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE 1 0 4 3 1 9
HARRIS CORP. 2 5 0 1 1 9
INFINEON TECHNOLOGIES AG 0 0 2 2 5 9
MITSUBISHI DENKI KABUSHIKI KAISHA 0 2 1 0 6 9
MOTOROLA, INC. 7 0 0 0 2 9
CHORUM TECHNOLOGIES INC. 5 3 0 0 0 8
CONTRAVES SPACE AG 1 3 2 1 1 8
TELCORDIA TECHNOLOGIES, INC. 3 4 1 0 0 8
TYCO SUBMARINE SYSTEMS LTD. 6 2 0 0 0 8
TYCO TELECOMMUNICATIONS (US) INC. 0 0 1 2 5 8
AGERE SYSTEMS OPTOELECTRONICS GUARDIAN CORP. 0 6 1 0 0 7
CISCO TECHNOLOGY, INC. 0 0 1 4 2 7
JDS FITEL INC. 1 2 1 2 1 7
KDD CORPORATION 0 0 2 3 2 7
SUMITOMO ELECTRIC INDUSTRIES CO., LTD. 1 1 1 2 2 7
SYCAMORE NETWORKS, INC. 0 0 4 2 1 7
AGERE SYSTEMS INC. 0 1 1 3 1 6
ANDO ELECTRIC CO., LTD. 2 3 0 1 0 6
HUGHES ELECTRONICS CORP. 0 2 2 1 1 6
KOKUSAI ELECTRIC CO., LTD. 0 0 4 0 2 6
PIRELLI CAVI E SISTEMI S.P.A. 1 3 1 1 0 6
SENECA NETWORKS, INC. 0 4 2 0 0 6
STRATALIGHT COMMUNICATIONS, INC. 0 0 3 1 2 6
TERABEAM CORPORATION 0 0 2 0 4 6
3COM CORPORATION 1 1 3 0 0 5
ADVANTEST CORP. 0 0 2 0 3 5
AGERE SYSTEMS GUARDIAN CORP. 0 0 5 0 0 5
BOEING COMPANY 1 0 2 0 2 5
FUJI XEROX CO., LTD. 0 2 1 1 1 5
JDS UNIPHASE CORPORATION 1 1 2 0 1 5
KONINKLIJKE PHILIPS ELECTRONICS N.V. 0 0 2 2 1 5
KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY 0 0 1 3 1 5
LOCKHEED MARTIN CORPORATION 1 2 2 0 0 5
MARCONI COMMUNICATIONS, INC. 0 0 1 3 1 5
NOKIA NETWORKS OY 0 1 4 0 0 5
OPNEXT JAPAN, INC. 0 0 1 2 2 5
SHARP KABUSHIKI KAISHA (SHARP CORPORATION) 1 1 2 1 0 5
SUN MICROSYSTEMS, INC. 2 1 1 0 1 5


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