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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 - 2009 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 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 7 254
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 2 162
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 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 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 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 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 36
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 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 25
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 24
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 24
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 22
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 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 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 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 15
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 14
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 14
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 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 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 12
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 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 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 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 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 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 10
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 10
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 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 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 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 9
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 8
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 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 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 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 8
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 0 0 0 1 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 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 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 7
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 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 7
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 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 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 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 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 7
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 1 0 2 1 1 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 7
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 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 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 6
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 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 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 6
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 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 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 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 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 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 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 6
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 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 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 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 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 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 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 5
RHEINISCHE BRAUNKOHLENWERKE AG 0 0 0 1 0 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 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 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 5


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