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U.S. PATENT AND TRADEMARK OFFICE
Patent Technology Monitoring Team (PTMT)

Patenting In Technology Classes,
Breakout By Organization

Count of 1969 - 2010 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 048, Gas: Heating and Illuminating

( 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 2009 2010 Total
~INDIVIDUALLY OWNED PATENT 16 6 2 6 10 7 7 12 9 9 8 13 7 12 6 15 8 6 8 3 9 7 3 4 0 4 6 0 2 7 3 4 3 0 2 6 1 8 5 3 7 8 262
TEXACO INC. 1 2 7 0 2 3 10 5 3 2 3 4 3 9 12 9 7 3 13 5 10 5 1 1 10 0 5 4 2 2 0 1 0 0 3 2 1 4 3 3 2 4 166
EXXON RESEARCH + ENGINEERING CO. 4 4 0 3 4 5 8 9 2 5 2 7 3 6 1 1 1 2 1 1 0 0 0 0 0 0 4 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 75
SHELL OIL COMPANY 1 0 0 1 0 0 3 2 0 0 0 0 0 0 0 1 0 1 1 2 13 10 4 2 1 0 2 0 0 1 1 0 0 0 0 0 0 4 0 1 1 0 52
METALLGESELLSCHAFT AKTIENGESELLSCHAFT 2 1 0 0 1 1 3 6 6 4 3 2 0 2 1 3 3 1 1 2 1 0 2 2 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 48
UNITED STATES OF AMERICA, DEPARTMENT OF ENERGY 0 0 0 0 0 0 0 8 1 1 3 1 3 3 3 6 0 2 0 2 1 0 1 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 38
TEXACO DEVELOPMENT CORPORATION 0 1 2 2 0 1 1 1 0 2 0 1 2 3 4 7 3 2 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 36
GENERAL ELECTRIC COMPANY 0 1 1 0 0 2 0 0 1 3 3 0 4 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 4 4 28
BRITISH GAS CORPORATION 0 0 0 0 0 1 1 3 0 7 1 4 1 1 2 2 1 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 27
KRUPP KOPPERS GMBH 0 0 0 0 0 0 0 3 1 0 0 1 0 0 0 0 1 0 1 1 2 8 1 1 0 0 3 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 25
INSTITUTE OF GAS TECHNOLOGY 2 1 0 3 1 0 4 0 1 0 0 1 0 2 2 1 1 2 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 24
GENERAL MOTORS CORPORATION 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 2 3 1 7 5 4 1 23
CHEVRON RESEARCH & TECHNOLOGY CO. 0 1 2 1 3 3 2 0 0 0 2 1 0 0 1 4 1 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
COMBUSTION ENGINEERING INC. 0 0 0 0 0 0 2 0 0 1 2 0 0 3 1 1 1 3 1 0 0 0 0 0 0 1 1 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 21
PHILLIPS PETROLEUM COMPANY 1 3 0 1 1 1 1 0 1 3 1 0 0 0 0 1 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 17
SIEMENS AKTIENGESELLSCHAFT 0 0 0 0 0 0 2 5 1 0 2 2 1 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 2 17
AIR PRODUCTS AND CHEMICALS, INC. 0 0 0 0 2 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 1 1 0 0 2 1 1 1 15
UNITED TECHNOLOGIES CORPORATION 3 1 0 0 0 0 0 0 0 4 0 2 1 0 1 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 14
HALDOR TOPSOE A/S 0 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 0 0 0 0 0 1 1 1 1 5 3 13
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 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 0 0 0 1 1 0 2 5 3 0 0 13
TOYOTA JIDOSHA K.K. 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 0 2 0 0 2 1 3 1 2 0 1 13
UNITED STATES OF AMERICA, DEPARTMENT OF THE INTERIOR 2 1 3 0 2 4 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 0 13
UNION CARBIDE CORPORATION 0 0 0 0 1 0 0 1 2 0 0 4 0 1 0 1 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 12
EBARA CORPORATION 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 1 2 0 1 1 0 1 0 0 1 1 2 0 11
HITACHI, LTD 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 4 1 0 0 0 0 0 0 1 3 0 0 0 0 0 0 0 0 0 0 1 0 11
ATLANTIC RICHFIELD COMPANY 0 0 1 0 1 0 0 0 0 0 0 3 0 2 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 10
FOSTER WHEELER ENERGY INTERNATIONAL, INC. 0 0 0 0 0 0 0 3 0 1 1 0 0 1 0 2 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10
GAS COUNCIL 6 1 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 0 0 0 0 0 0 0 0 0 10
IDATECH LLC 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 0 0 0 2 1 1 2 3 10
NISSAN MOTOR COMPANY, LIMITED 0 0 0 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 0 0 2 0 2 1 1 1 2 10
UOP 0 0 0 1 1 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 0 0 0 0 1 10
BATTELLE MEMORIAL INSTITUTE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 2 1 0 1 0 0 0 0 0 0 0 0 2 1 9
CONOCO, INC. 0 0 0 0 0 0 0 1 0 0 0 2 3 1 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 9
DR. C. OTTO COMP. G.M.B.H. 0 0 0 0 0 0 0 2 3 2 1 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 0 0 0 9
HONDA GIKEN KOGYO KABUSHIKI KAISHA (HONDA MOTOR 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 0 0 0 0 0 0 1 1 1 3 1 2 9
INTERNATIONAL FUEL CELLS CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 0 0 0 1 1 1 0 2 0 0 0 0 0 0 0 0 0 0 0 0 9
RUHRCHEMIE AKTIENGESELLSCHAFT 0 0 1 0 0 0 0 0 0 0 0 0 0 1 1 3 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 9
BERGWERKSVERBAND GMBH 0 0 0 0 0 0 0 0 0 1 0 0 0 0 2 1 1 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8
DELPHI TECHNOLOGIES, 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 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 3 8
DOW CHEMICAL COMPANY 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 3 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8
IMPERIAL CHEMICAL INDUSTRIES PLC 1 0 0 2 0 0 1 1 1 1 0 0 0 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 8
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. 0 0 0 0 0 0 0 1 3 0 2 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 8
ALLIS-CHALMERS CORPORATION 0 0 0 0 0 0 0 1 0 0 0 0 1 1 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 0 0 0 7
BABCOCK & WILCOX COMPANY 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 1 2 1 0 0 1 0 0 0 0 0 0 0 0 0 7
BRENNSTOFFINSTITUT FREIBERG 0 0 0 0 0 0 0 0 0 0 0 0 2 2 1 0 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 7
HYDROCARBON RESEARCH INC. 0 0 0 0 1 1 0 1 0 1 0 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 0 0 0 0 0 7
INSTITUT FRANCAIS DU PETROLE 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 0 0 0 1 1 0 0 1 0 0 0 0 0 0 0 1 1 7
JAPAN GASOLINE CO., LTD 1 0 0 0 0 0 2 2 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 7
KRAFTWERK UNION AKTIENGESELLSCHAFT 0 0 0 0 0 0 0 0 0 1 0 1 2 0 0 0 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 7
MARATHON ASHLAND PETROLEUM LLC 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 1 2 2 0 0 0 0 0 0 1 0 7
MILLENNIUM CELL, 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 0 0 0 0 0 0 0 0 0 0 0 0 1 2 2 1 1 0 7
MODINE MANUFACTURING COMPANY 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 0 0 0 0 0 0 0 0 0 0 0 1 0 4 1 7
NUCELLSYS 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 0 0 0 0 0 0 0 0 0 0 3 1 2 1 0 7
CASIO COMPUTER 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 0 0 0 0 0 0 0 0 0 2 1 3 6
CONSOLIDATION COAL COMPANY 0 1 1 3 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 0 0 0 0 0 0 0 0 0 0 0 6
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY 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 1 1 0 0 2 0 2 0 6
FOSTER WHEELER ENERGIA OY 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 2 0 0 1 1 0 0 0 0 0 0 0 1 0 6
KAMYR INC. 0 0 0 0 0 0 0 2 1 2 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 0 0 0 0 6
LUMMUS COMPANY 3 1 0 0 0 0 0 0 0 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 6
NUVERA FUEL CELLS, 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 0 0 0 0 0 0 0 0 0 0 1 0 0 2 0 2 1 0 6
PULLMAN, INCORPORATED 1 0 2 0 1 1 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 0 0 0 0 0 0 0 0 6
RHEINISCHE BRAUNKOHLENWERKE AG 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 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 0 0 6
ROCKWELL INTERNATIONAL CORPORATION 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
SUMITOMO METAL INDUSTRIES CO., LTD. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
TOYO ENGINEERING CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 6
WESTINGHOUSE ELECTRIC CORP. 0 0 1 0 0 2 0 0 0 0 0 0 0 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 6
CHEMICAL CONSTRUCTION CORPORATION 3 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 0 0 0 0 0 5
GULF OIL CORPORATION 0 0 0 0 0 0 0 5 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 5
KOPPERS COMPANY INC. 0 0 0 0 0 0 0 1 0 0 0 1 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 5
L'AIR LIQUIDE, SOCIETE ANONYME A DIRECTOIRE ET CONSEIL DE SURVEILLANCE POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE 0 0 0 0 0 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 0 0 0 0 1 0 1 1 0 0 5
L. C. STEINMULLER GMBH 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 5
MOBIL OIL CORP. 0 1 1 0 0 0 0 0 1 0 0 0 0 0 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 0 5
PARSONS CORPORATION 0 0 0 0 0 0 0 2 1 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 0 0 5
RUHRKOHLE AG 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 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 5
SAMSUNG SDI 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 0 0 0 0 0 0 0 0 0 0 1 4 5
STEAG AKTIENGESELLSCHAFT 0 0 0 0 0 0 1 0 1 1 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 5
TOSHIBA CORPORATION 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 0 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 5


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