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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 384, Bearings

( 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 25 23 20 32 25 125
NSK LIMITED 12 21 21 33 37 124
NTN CORPORATION 8 7 10 11 16 52
KOYO SEIKO COMPANY, LTD. 7 8 9 13 11 48
TORRINGTON COMPANY 7 8 5 8 6 34
THK CO., LTD. 3 6 13 6 5 33
NIPPON THOMPSON CO., LTD. 6 6 11 7 2 32
MINEBEA KABUSHIKI-KAISHA (MINEBEA CO., LTD) 5 3 7 6 10 31
DAIDO METAL COMPANY 2 1 9 7 8 27
INA WALZLAGER SCHAEFFLER OHG 1 1 9 8 8 27
SKF GMBH 7 4 7 7 2 27
SAMSUNG ELECTRONICS CO., LTD. 2 14 4 0 2 22
TIMKEN COMPANY 3 4 1 5 9 22
SKF INDUSTRIE S.P.A. 2 5 4 5 3 19
RELIANCE ELECTRIC INDUSTRIAL COMPANY 8 4 2 0 0 14
SANKYO SEIKI MFG. CO., LTD. 5 1 2 2 4 14
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 1 2 2 2 5 12
SKF FRANCE 0 1 1 5 4 11
DANA CORPORATION 2 2 1 3 2 10
INTERNATIONAL BUSINESS MACHINES CORPORATION 2 2 1 3 1 9
SEAGATE TECHNOLOGY, INCORPORATED 1 6 2 0 0 9
SEAGATE TECHNOLOGY, LLC 0 0 1 5 3 9
AKTIEBOLAGET SKF 0 3 3 2 0 8
ALLIED-SIGNAL INC. 0 4 2 1 1 8
DAIMLER-CHRYSLER AKTIENGESELLSCHAFT 0 1 0 6 1 8
GENERAL ELECTRIC COMPANY 0 0 2 3 3 8
INA WALZLAGER SCHAEFFLER KG 3 4 1 0 0 8
NIDEC CORPORATION 2 1 3 1 1 8
NIKON CORPORATION 1 0 1 3 3 8
THOMSON INDUSTRIES INC. 2 1 2 2 1 8
ROBERT BOSCH GMBH 0 0 2 3 2 7
SUMITOMO ELECTRIC INDUSTRIES CO., LTD. 0 1 2 3 1 7
EMERSON POWER TRANSMISSION CORP. 2 2 0 1 1 6
FAG OEM UND HANDEL AG 1 0 2 1 2 6
GENERAL MOTORS CORPORATION 3 0 1 1 1 6
GLYCO METALL-WERKE GLYCO B.V. & CO. KG 1 0 3 2 0 6
MOHAWK INNOVATIVE TECHNOLOGY, INC. 2 3 1 0 0 6
RELIANCE ELECTRIC TECHNOLOGIES, LLC 0 0 2 2 2 6
REXNORD CORPORATION 1 2 2 0 1 6
SEIKO INSTRUMENTS INC. 0 0 0 2 4 6
SKF INDUSTRIAL TRADING AND DEVELOPMENT COMPANY, N.V. 2 3 1 0 0 6
SKF LINEARSYSTEME GMBH 0 0 3 2 1 6
SUNONWEALTH ELECTRIC MACHINE INDUSTRY CO., LTD. 0 1 0 2 3 6
CAMCO INTERNATIONAL INC. 3 0 0 1 1 5
DELTA ELECTRONICS INC. 0 2 1 2 0 5
DEUTSCHE STAR GMBH 1 1 1 2 0 5
EMERSON ELECTRIC CO. 0 1 0 4 0 5
FAG AUTOMOBILTECHNIK AG 0 1 2 1 1 5
RENK AKTIENGESELLSCHAFT 3 1 1 0 0 5
SKF ENGINEERING AND RESEARCH CENTRE, B.V. 0 0 0 1 4 5
UNITED STATES OF AMERICA, NAVY 1 4 0 0 0 5
UNITED TECHNOLOGIES CORPORATION 1 1 1 1 1 5


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