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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 501, Compositions: Ceramic

( 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
CORNING INCORPORATED 4 7 11 20 19 61
~Individually Owned Patent 10 11 5 12 12 50
MURATA MANUFACTURING CO., LTD. 7 5 7 5 22 46
ASAHI GLASS COMPANY, LTD. 11 7 1 7 5 31
NIPPON SHEET GLASS CO., LTD. 1 6 4 6 11 28
SCHOTT GLASWERKE 4 1 6 8 7 26
KABUSHIKI KAISHA OHARA 0 6 2 7 9 24
KYOCERA CORPORATION 4 6 4 6 4 24
NGK INSULATORS LTD. 6 7 5 1 4 23
NGK SPARK PLUG CO., LTD. 1 7 7 5 3 23
TDK CORPORATION 2 2 3 4 9 20
SUMITOMO ELECTRIC INDUSTRIES CO., LTD. 3 5 3 4 2 17
NIPPON ELECTRIC GLASS COMPANY LIMITED 3 0 3 3 6 15
AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY 6 1 3 4 0 14
GENERAL ELECTRIC COMPANY 3 4 1 2 2 12
SAINT-GOBAIN VITRAGE 6 2 2 1 1 12
CORNING S.A. 0 0 4 5 2 11
TOSHIBA CORPORATION 3 2 2 1 2 10
HOYA CORPORATION 1 1 3 3 1 9
LIBBEY-OWENS-FORD COMPANY 2 4 1 1 0 8
UNITED STATES OF AMERICA, NAVY 1 1 2 3 1 8
ISOVER SAINT-GOBAIN 0 1 4 2 0 7
JOHNS MANVILLE INTERNATIONAL, INC. 0 3 1 2 1 7
LG ELECTRONICS INC. 1 0 0 4 2 7
NIKON CORPORATION 1 1 1 2 2 7
UBE INDUSTRIES LTD. 1 5 0 1 0 7
CERDEC AKTIENGESELLSCHAFT KERAMISCHE FARBEN 4 1 1 0 0 6
EASTMAN KODAK COMPANY 3 0 2 1 0 6
FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANTEN FORSCHUNG E.V. 0 2 3 0 1 6
HONDA GIKEN KOGYO KABUSHIKI KAISHA (HONDA MOTOR CO., LTD.) 1 2 1 2 0 6
KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY 1 1 3 1 0 6
KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY 3 2 0 0 1 6
MORGAN CRUCIBLE COMPANY PLC 2 3 0 1 0 6
NATIONAL SCIENCE COUNCIL 3 1 0 1 1 6
NEC CORPORATION 1 3 0 0 2 6
OWENS-CORNING FIBERGLAS CORPORATION 1 1 4 0 0 6
PPG INDUSTRIES OHIO INC. 0 0 2 2 2 6
SANDVIK AKTIEBOLAG 0 3 1 1 1 6
TOSOH CORPORATION 1 0 3 1 1 6
BRIDGESTONE CORPORATION 0 1 1 2 1 5
FERRO-CORPORATION 1 1 1 0 2 5
FORD MOTOR COMPANY 2 2 1 0 0 5
HARBISON-WALKER REFRACTORIES COMPANY 2 0 0 2 1 5
IVOCLAR AG 0 1 1 1 2 5
SAINT GOBAIN/NORTON INDUSTRIAL CERAMICS CORP. 2 2 1 0 0 5


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