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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 381, Electrical Audio Signal Processing Systems and Devices

( 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
~Individually Owned Patent 115 63 60 43 68 349
SONY CORPORATION 22 24 20 9 9 84
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 12 11 9 4 12 48
U.S. PHILIPS CORPORATION 14 2 8 5 3 32
NEW TRANSDUCERS LIMITED 0 0 3 18 10 31
SIEMENS AUDIOLOGISCHE TECHNIK GMBH 9 3 9 4 6 31
NEC CORPORATION 9 7 3 6 2 27
SAMSUNG ELECTRONICS CO., LTD. 12 5 5 2 2 26
YAMAHA CORPORATION 12 4 6 1 3 26
LUCENT TECHNOLOGIES INC. 13 4 6 0 1 24
PIONEER ELECTRONIC CORPORATION 6 5 3 2 4 20
AMERICAN TECHNOLOGY CORPORATION 0 3 6 6 4 19
MOTOROLA, INC. 6 4 8 1 0 19
HARMAN INTERNATIONAL INDUSTRIES, INC. 1 5 0 4 5 15
NOISE CANCELLATION TECHNOLOGIES, INC. 9 1 2 3 0 15
ETYMOTIC RESEARCH, INC. 0 2 6 3 2 13
FUJITSU LIMITED 2 2 2 5 2 13
MURATA MANUFACTURING CO., LTD. 2 2 5 1 3 13
STAR MICRONICS CO., LTD. 1 4 5 0 2 12
BOSE CORPORATION 4 2 1 2 2 11
COMPAQ COMPUTER CORPORATION, INC. 3 2 4 1 1 11
KABUSHIKI KAISHA AUDIO-TECHNICA 0 1 7 2 1 11
INTERNATIONAL BUSINESS MACHINES CORPORATION 2 2 1 1 4 10
RESOUND CORPORATION 2 2 4 1 1 10
ADVANCED MICRO DEVICES, INC. 3 1 2 3 0 9
NIPPON TELEGRAPH & TELEPHONE CORP. 6 2 1 0 0 9
QSOUND LABS, INC. 3 2 0 3 1 9
SENNHEISER ELECTRONIC GMBH & CO. KG 2 2 2 1 2 9
SONIC INNOVATIONS, INC. 0 0 3 2 4 9
ANDREA ELECTRONICS CORPORATION 3 1 1 2 1 8
BELTONE ELECTRONICS CORPORATION 1 3 2 1 1 8
SIEMENS HEARING INSTRUMENTS, INC. 4 2 2 0 0 8
UNITED STATES OF AMERICA, NAVY 0 2 1 1 4 8
APPLE COMPUTER, INC. 1 4 0 1 1 7
INTEL CORPORATION 2 1 2 1 1 7
SARNOFF CORPORATION & CO., LTD. 0 1 1 2 3 7
TOPHOLM & WESTERMANN APS 1 3 0 1 2 7
VICTOR COMPANY OF JAPAN, LIMITED 3 2 2 0 0 7
AUREAL SEMICONDUCTOR INC. 3 1 2 0 0 6
CITIZEN ELECTRONICS CO., LTD. 0 0 3 2 1 6
GN RESOUND AS 0 0 0 3 3 6
INTERVAL RESEARCH CORPORATION 3 1 1 1 0 6
LG ELECTRONICS INC. 1 3 1 0 1 6
MICROTRONIC NEDERLAND, B.V. 2 0 3 1 0 6
NOKIA TECHNOLOGY GMBH 3 2 1 0 0 6
SRS LABS, INC. 2 3 0 1 0 6
TELEX COMMUNICATIONS, INC. 1 3 0 1 1 6
TEXAS INSTRUMENTS, INCORPORATED 0 2 1 1 2 6
APHEX SYSTEMS LTD. 2 2 0 1 0 5
AUDIOLOGIC, INC. 2 0 3 0 0 5
BOSTON ACOUSTICS, INC. 1 2 0 0 2 5
COTRON CORPORATION 1 0 3 0 1 5
CREATIVE TECHNOLOGY LIMITED 1 1 0 1 2 5
DECIBEL INSTRUMENTS, INC. 1 1 2 1 0 5
FORD MOTOR COMPANY 2 1 2 0 0 5
FRANCE TELECOM 4 0 0 0 1 5
HARMAN AUDIO ELECTRONIC SYSTEMS GMBH 0 0 2 1 2 5
KABUSHIKI KAISHA KENWOOD 5 0 0 0 0 5
KNOWLES ELECTRONICS, INC. 1 2 2 0 0 5
LORD CORPORATION 3 1 0 0 1 5
MICRO EAR TECHNOLOGY, INC. 1 0 0 0 4 5
NOKIA MOBILE PHONES LTD. 0 0 1 3 1 5
ROHM COMPANY LIMITED 2 1 1 1 0 5
STMICROELECTRONICS, GMBH 0 3 1 0 1 5
TELEFONAKTIEBOLAGET LM ERICSSON 0 2 0 0 3 5


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