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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 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 2000 2001 2002 2003 2004 Total
CORNING INCORPORATED 11 20 19 15 12 77
~Individually Owned Patent 5 12 12 14 5 48
MURATA MANUFACTURING CO., LTD. 7 5 22 9 3 46
NIPPON SHEET GLASS CO., LTD. 4 6 11 6 7 34
SCHOTT GLASWERKE 6 8 7 4 7 32
KABUSHIKI KAISHA OHARA 2 7 9 4 7 29
TDK CORPORATION 3 4 9 7 4 27
MINOLTA CAMERA CO., LTD. 0 0 3 22 0 25
NIPPON ELECTRIC GLASS COMPANY LIMITED 3 3 6 7 5 24
ASAHI GLASS COMPANY, LTD. 1 7 5 7 3 23
KYOCERA CORPORATION 4 6 4 6 3 23
NGK SPARK PLUG CO., LTD. 7 5 3 1 4 20
NGK INSULATORS LTD. 5 1 4 4 4 18
HOYA CORPORATION 3 3 1 5 5 17
SUMITOMO ELECTRIC INDUSTRIES CO., LTD. 3 4 2 3 2 14
PPG INDUSTRIES OHIO INC. 2 2 2 3 4 13
CORNING S.A. 4 5 2 0 0 11
UNITED STATES OF AMERICA, NAVY 2 3 1 3 2 11
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 0 1 1 2 5 9
AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY 3 4 0 0 1 8
LG ELECTRONICS INC. 0 4 2 2 0 8
NIKON CORPORATION 1 2 2 2 1 8
SAINT-GOBAIN CERAMICS & PLASTICS, INC. 0 1 0 1 6 8
SAMSUNG ELECTRO-MECHANICS CO., LTD. 0 0 3 1 4 8
TOSHIBA CORPORATION 2 1 2 1 2 8
3M INNOVATIVE PROPERTIES COMPANY 0 1 3 2 1 7
GUARDIAN INDUSTRIES CORPORATION 0 1 2 3 1 7
JOHNS MANVILLE INTERNATIONAL, INC. 1 2 1 1 2 7
TAIYO YUDEN CO., LTD. 1 0 0 5 1 7
FERRO-CORPORATION 1 0 2 1 2 6
ISOVER SAINT-GOBAIN 4 2 0 0 0 6
AGENCY FOR DEFENCE DEVELOPMENT 1 0 2 2 0 5
BRIDGESTONE CORPORATION 1 2 1 1 0 5
GENERAL ELECTRIC COMPANY 1 2 2 0 0 5
HERAEUS QUARZGLAS GMBH & CO. KG 1 0 2 1 1 5
IVOCLAR AG 1 1 2 1 0 5
MRA LABORATORIES, INC. 1 2 0 0 2 5
OWENS-CORNING FIBERGLAS CORPORATION 4 0 0 0 1 5
SHIN ETSU CHEMICAL CO., LTD. 0 1 2 1 1 5
SUMITOMO SPECIAL METAL COMPANY LIMITED 0 2 1 0 2 5
TOSOH CORPORATION 3 1 1 0 0 5
VESUVIUS CRUCIBLE COMPANY 0 2 1 2 0 5


PTMD Contacts

Questions regarding these reports should be directed to:

U.S. Patent and Trademark Office
Office of Electronic Information Products - PTMD
MDW 4C18; P.O Box 1450
Alexandria VA 22313-1450

tel: (571) 272-5600
fax: (571) 273-0110
email: oeip@uspto.gov

address of PTMD pages at the USPTO Web Site: http://www.uspto.gov/web/offices/ac/ido/oeip/taf/tafp.html
ftp download of selected PTMD reports and materials from : ftp.uspto.gov/pub/taf/


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