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U.S. PATENT AND TRADEMARK OFFICE
Electronic Information Products Division
Patent Technology Monitoring Team (PTMT)

Patenting In Technology Classes,
Breakout By Organization

Count of 1969 - 2008 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 218, High-Voltage Switches with Arc Preventing or Extinguishing 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 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Total
WESTINGHOUSE ELECTRIC CORP. 8 20 24 16 6 20 9 13 15 22 7 12 11 7 11 15 9 2 9 5 4 5 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 252
SIEMENS AKTIENGESELLSCHAFT 2 1 4 1 7 19 11 8 7 4 3 4 6 5 4 14 14 11 9 7 3 4 4 3 2 3 1 8 3 9 4 5 8 10 4 9 6 5 2 2 236
GENERAL ELECTRIC COMPANY 16 17 22 7 7 13 6 7 13 9 1 4 1 4 4 6 4 2 10 6 1 4 1 0 0 2 1 0 1 3 3 2 11 4 2 0 0 0 0 0 194
HITACHI, LTD 0 1 2 0 6 2 4 3 4 3 3 9 3 4 3 5 6 1 3 1 1 2 5 7 5 1 2 4 7 14 2 4 5 7 8 11 5 1 3 1 158
MITSUBISHI DENKI KABUSHIKI KAISHA 0 0 0 1 1 0 0 0 0 2 1 8 10 4 8 18 11 7 8 8 7 4 3 5 2 3 2 4 3 2 2 2 1 2 4 1 2 1 1 1 139
EATON CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 2 0 1 0 0 1 3 0 2 2 3 1 9 6 4 4 6 2 4 2 8 6 1 70
I-T-E IMPERIAL CORPORATION 1 12 12 1 5 16 8 6 5 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 69
TOSHIBA CORPORATION 0 0 4 1 0 1 0 2 0 3 0 3 5 0 3 7 3 2 2 2 0 1 1 1 1 2 5 2 0 1 1 2 0 5 3 2 1 1 0 0 67
~INDIVIDUALLY OWNED PATENT 1 2 5 7 2 4 0 1 5 0 1 0 2 3 1 0 3 3 1 2 2 2 1 1 2 2 0 2 0 0 0 2 3 0 0 2 0 1 0 0 63
BBC BROWN, BOVERI & COMPANY, LIMITED 0 0 0 0 0 3 1 1 1 2 1 3 1 3 5 9 4 5 11 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 53
ALLIS-CHALMERS CORPORATION 3 4 8 9 5 4 4 4 3 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 47
SPRECHER + SCHUH AG 0 0 1 1 2 0 3 3 8 3 0 2 2 5 7 4 2 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 46
MERLIN GERIN S.A. 0 1 2 5 2 0 1 2 0 0 0 0 0 1 0 1 3 0 1 5 4 3 3 3 2 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 44
MEIDENSHA ELECTRIC MFG. CO. LTD. 0 0 0 0 0 0 2 1 0 0 0 0 2 3 6 8 5 1 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 3 1 1 0 0 39
BROWN, BOVERI + CIE A. G. 6 1 4 9 8 1 0 2 0 0 0 1 0 0 2 0 0 0 0 1 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 38
GEC ALSTHOM SA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 8 10 9 9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 37
SQUARE D COMPANY 1 0 2 2 0 0 0 0 0 0 0 1 2 1 0 1 0 3 1 2 2 2 2 2 1 1 1 3 1 0 0 0 1 2 2 0 0 1 0 0 37
S & C ELECTRIC CO. 0 2 4 1 1 0 2 0 0 2 0 1 2 1 3 0 2 1 2 0 0 1 3 1 0 1 1 1 2 1 0 0 1 0 0 0 0 0 0 0 36
GEC ALSTHOM T&D SA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 3 3 6 10 6 0 1 0 0 0 0 0 0 32
MCGRAW-EDISON COMPANY 0 1 1 1 1 2 2 1 0 2 1 0 1 0 1 3 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 1 0 0 24
ASEA AKTIEBOLAG 2 3 3 3 1 3 0 0 2 1 0 0 1 2 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22
ELECTRIC POWER RESEARCH INSTITUTE, INC. 0 0 0 0 0 0 0 0 0 0 1 4 13 1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 21
SCHNEIDER ELECTRIC SA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 3 4 0 2 3 1 2 0 0 1 1 21
ALSTOM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 8 7 1 1 0 0 0 18
ASEA BROWN BOVERI AKTIENGESELLSCHAFT 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 4 6 3 3 0 0 0 0 0 0 0 18
SIEMENS ENERGY & AUTOMATION, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 3 1 0 0 0 1 1 0 2 3 0 2 0 1 0 0 0 0 0 18
ABB POWER T&D COMPANY INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 2 5 4 1 2 0 0 1 0 0 0 0 0 0 17
COOPER INDUSTRIES INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 3 0 2 0 1 0 1 0 1 3 1 1 1 0 0 1 0 0 0 0 16
LA TELEMECANIQUE ELECTRIQUE 1 0 1 0 0 0 0 0 0 0 0 1 1 0 1 0 2 1 5 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14
ALSTHOM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 7 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13
FUJI ELECTRIC CO., LTD. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1 1 0 1 1 0 0 2 1 2 0 1 0 0 0 0 0 0 0 0 13
GOULD INC. 0 0 0 0 0 0 0 0 0 0 1 5 5 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13
ALSTHOM-ATLANTIQUE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 3 4 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12
HAZEMEIJER B.V. 0 0 0 0 0 0 3 0 0 5 0 0 2 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12
LG INDUSTRIAL SYSTEMS CO., LTD. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 1 0 1 1 3 0 0 0 0 11
LICENTIA PATENT-VERWALTUNGS-GMBH 0 0 2 0 0 0 0 0 1 1 0 2 1 0 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11
ENGLISH ELECTRIC COMPANY LIMITED 3 3 2 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10
ABB RESEARCH LTD. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 3 1 2 2 0 0 0 0 0 0 0 9
DELLE-ALSTHOM S.A 0 0 0 0 1 0 1 0 1 2 0 1 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9
ITT CORPORATION 0 1 1 1 2 1 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9
N.V. COQ 0 1 5 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9
ABB TECHNOLOGY AG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 2 1 3 8
MAGRINI FABBRICHE RIUNITE MAGRINI SCARPA E MAGNANO-M.S.M.-S. 0 1 1 4 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8
ABB (SCHWEIZ) AG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 2 1 1 2 0 7
ABB SERVICE S.R.L. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 4 0 0 0 1 7
BROWN BOVERI ELECTRIC INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7
HUBBELL INCORPORATED 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 3 0 0 2 1 0 0 0 7
SIEMENS-ALLIS, INC. 0 0 0 0 0 0 0 0 0 1 0 1 0 2 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7
SPRECHER ENERGIE AG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7
A. B. CHANCE CO. 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
ABB PATENT GMBH 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 3 0 0 0 1 0 0 0 0 1 0 6
ASEA BROWN BOVERI AB 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 1 0 0 0 0 0 2 0 0 0 0 1 0 0 0 6
NORTHERN ENGINEERING INDUSTRIES PLC 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 3 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
SACHSENWERK AG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
ABB MANAGEMENT AG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0 5
CLEAVELAND/PRICE ENTERPRISES, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 2 0 1 0 0 5
GEC ALSTHOM ENERGIE INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 5
JOSLYN MFG. AND SUPPLY CO. 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
MATSUSHITA ELECTRIC WORKS, LTD. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 5
SACE S.P.A. COSTRUZIONI ELETTROMECCANICHE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
SOUTH WALES SWITCHGEAR LIMITED 0 0 0 0 0 0 0 0 0 0 0 0 2 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5



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