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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 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 2001 2002 2003 2004 2005 Total
LUCENT TECHNOLOGIES INC. 24 19 48 29 12 132
FUJITSU LIMITED 27 33 26 21 20 127
NEC CORPORATION 26 23 24 14 9 96
NORTEL NETWORKS LIMITED 13 15 17 32 19 96
ALCATEL 20 21 14 24 6 85
~Individually Owned Patent 7 10 12 9 12 50
CIENA CORPORATION 10 8 9 4 12 43
HITACHI, LTD 6 6 8 10 4 34
AT&T CORP. 1 5 10 9 7 32
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 1 6 10 9 4 30
INTERNATIONAL BUSINESS MACHINES CORPORATION 4 7 5 4 7 27
SAMSUNG ELECTRONICS CO., LTD. 6 4 4 5 5 24
SIEMENS AKTIENGESELLSCHAFT 2 3 4 8 7 24
AGILENT TECHNOLOGIES, INC. 3 4 6 6 4 23
CORVIS CORPORATION 3 2 7 5 5 22
UNIVERSITY OF CALIFORNIA, THE REGENTS OF 0 1 6 9 6 22
SONY CORPORATION 5 3 6 1 3 18
NIPPON TELEGRAPH & TELEPHONE CORP. 1 2 5 5 3 16
SCIENTIFIC-ATLANTA, INC. 1 9 3 3 0 16
BRITISH TELECOMMUNICATION, PLC 7 5 1 1 1 15
NORTHROP GRUMMAN CORPORATION 0 1 5 4 4 14
AVANEX CORPORATION 2 3 2 4 2 13
CORNING INCORPORATED 1 5 5 2 0 13
OKI ELECTRIC INDUSTRY CO., LTD. 2 1 3 2 5 13
CHORUM TECHNOLOGIES LP 3 3 6 0 0 12
MASSACHUSETTS INSTITUTE OF TECHNOLOGY 2 3 5 2 0 12
TELEFONAKTIEBOLAGET LM ERICSSON 1 2 6 1 2 12
TYCOM (US) INC. 4 8 0 0 0 12
INFINEON TECHNOLOGIES AG 0 2 2 5 2 11
JDS UNIPHASE CORPORATION 1 2 0 1 7 11
MITSUBISHI DENKI KABUSHIKI KAISHA 2 1 0 6 2 11
TERABEAM CORPORATION 0 2 0 4 5 11
TRW INC. 2 6 3 0 0 11
WORLDCOM, INC. 0 4 4 3 0 11
CISCO PHOTONICS ITALY, S.R.L. 1 3 4 1 1 10
CISCO TECHNOLOGY, INC. 0 1 4 2 3 10
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE 0 4 3 1 2 10
HARRIS CORP. 5 0 2 1 2 10
MARCONI COMMUNICATIONS LIMITED 3 3 3 1 0 10
OPNEXT JAPAN, INC. 0 1 2 2 5 10
CANON KABUSHIKI KAISHA 3 2 3 0 1 9
CONTRAVES SPACE AG 3 2 1 1 2 9
SUMITOMO ELECTRIC INDUSTRIES CO., LTD. 1 1 2 2 3 9
TOSHIBA CORPORATION 1 3 1 2 2 9
TYCO TELECOMMUNICATIONS (US) INC. 0 1 2 5 1 9
AGERE SYSTEMS INC. 1 1 3 1 2 8
KOKUSAI DENSHIN DENWA KABUSHIKI KAISHA 7 1 0 0 0 8
SYCAMORE NETWORKS, INC. 0 4 2 1 1 8
AGERE SYSTEMS OPTOELECTRONICS GUARDIAN CORP. 6 1 0 0 0 7
FINISAR CORPORATION, INC. 0 0 0 1 6 7
KDD CORPORATION 0 2 3 2 0 7
KOKUSAI ELECTRIC CO., LTD. 0 4 0 2 1 7
LIGHTPOINTE COMMUNICATIONS, INC. 1 1 0 1 4 7
SPRINT COMMUNICATIONS COMPANY L.P. 0 1 3 1 2 7
STRATALIGHT COMMUNICATIONS, INC. 0 3 1 2 1 7
UNITED STATES OF AMERICA, NAVY 0 4 1 2 0 7
BOEING COMPANY 0 2 0 2 2 6
DORSAL NETWORKS, INC. 0 0 1 1 4 6
FITEL U.S.A. CORP. 0 2 2 0 2 6
HUGHES ELECTRONICS CORP. 2 2 1 1 0 6
JDS FITEL INC. 2 1 2 1 0 6
KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY 0 1 3 1 1 6
MCI COMMUNICATIONS CORP. 5 1 0 0 0 6
MOTOROLA, INC. 0 0 1 2 3 6
NOKIA CORPORATION 0 0 0 4 2 6
SENECA NETWORKS, INC. 4 2 0 0 0 6
SHARP KABUSHIKI KAISHA (SHARP CORPORATION) 1 2 1 0 2 6
ADVANTEST CORP. 0 2 0 3 0 5
AGERE SYSTEMS GUARDIAN CORP. 0 5 0 0 0 5
FUJI XEROX CO., LTD. 2 1 1 1 0 5
KONINKLIJKE PHILIPS ELECTRONICS N.V. 0 2 2 1 0 5
LOCKHEED MARTIN CORPORATION 2 2 0 0 1 5
MARCONI COMMUNICATIONS, INC. 0 1 3 1 0 5
NOKIA NETWORKS OY 1 4 0 0 0 5
PIRELLI CAVI E SISTEMI S.P.A. 3 1 1 0 0 5
QUANTUM BRIDGE COMMUNICATIONS, INC. 0 1 2 1 1 5
TELCORDIA TECHNOLOGIES, INC. 4 1 0 0 0 5
TELLABS OPERATIONS INC. 0 1 0 2 2 5
ZILOG, INC. 2 1 1 0 1 5


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Electronic Information Products Division - PTMB
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Alexandria VA 22313-1450

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email: oeip@uspto.gov

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