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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 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 2001 2002 2003 2004 2005 Total
CORNING INCORPORATED 20 19 15 12 9 75
~Individually Owned Patent 12 12 14 5 6 49
MURATA MANUFACTURING CO., LTD. 5 22 9 3 7 46
NIPPON SHEET GLASS CO., LTD. 6 11 6 7 4 34
SCHOTT GLASWERKE 8 7 4 7 7 33
KABUSHIKI KAISHA OHARA 7 9 4 7 2 29
TDK CORPORATION 4 9 7 4 5 29
MINOLTA CAMERA CO., LTD. 0 3 21 0 3 27
NIPPON ELECTRIC GLASS COMPANY LIMITED 3 6 7 5 4 25
ASAHI GLASS COMPANY, LTD. 7 5 7 3 2 24
KYOCERA CORPORATION 6 4 6 3 2 21
HOYA CORPORATION 3 1 5 5 4 18
NGK INSULATORS LTD. 1 4 4 4 5 18
NGK SPARK PLUG CO., LTD. 5 3 1 4 4 17
PPG INDUSTRIES OHIO INC. 2 2 3 4 5 16
SAMSUNG ELECTRO-MECHANICS CO., LTD. 0 3 1 4 4 12
SUMITOMO ELECTRIC INDUSTRIES CO., LTD. 4 2 3 2 1 12
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 1 1 2 5 2 11
SAINT-GOBAIN CERAMICS & PLASTICS, INC. 1 0 1 6 3 11
GUARDIAN INDUSTRIES CORPORATION 1 2 3 1 3 10
UNITED STATES OF AMERICA, NAVY 3 1 3 2 0 9
3M INNOVATIVE PROPERTIES COMPANY 1 3 2 1 1 8
LG ELECTRONICS INC. 4 2 2 0 0 8
CORNING S.A. 5 2 0 0 0 7
NIKON CORPORATION 2 2 2 1 0 7
E. I. DU PONT DE NEMOURS AND COMPANY 0 0 0 2 4 6
FERRO-CORPORATION 0 2 1 2 1 6
JOHNS MANVILLE INTERNATIONAL, INC. 2 1 1 2 0 6
TAIYO YUDEN CO., LTD. 0 0 5 1 0 6
TOSHIBA CORPORATION 1 2 1 2 0 6
AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY 4 0 0 1 0 5
KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY 0 1 0 3 1 5
REFRATECHNIK HOLDING GMBH 0 0 0 2 3 5
SHIN ETSU CHEMICAL CO., LTD. 1 2 1 1 0 5
SUMITOMO SPECIAL METAL COMPANY LIMITED 2 1 0 2 0 5
TOSHIBA CERAMICS CO., LTD. 1 1 0 1 2 5
VESUVIUS CRUCIBLE COMPANY 2 1 2 0 0 5


PTMB Contacts

Questions regarding these reports should be directed to:

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

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

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


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