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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 1969 - 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 110, Furnaces

( 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 Total
~Individually Owned Patent 18 22 42 24 33 41 22 12 20 14 9 20 35 33 35 34 29 29 32 37 28 42 36 35 29 44 28 22 19 30 15 17 21 19 12 15 953
COMBUSTION ENGINEERING INC. 6 0 2 2 1 3 1 1 1 3 3 5 12 7 6 19 10 8 9 3 0 0 1 0 1 4 4 1 3 8 2 1 0 0 0 0 127
BABCOCK & WILCOX COMPANY 1 0 0 0 0 3 1 1 0 0 0 0 0 0 1 1 2 2 0 1 1 0 2 0 3 6 0 4 5 7 0 3 1 1 0 1 47
FOSTER WHEELER ENERGY INTERNATIONAL, INC. 0 0 0 0 0 0 1 0 1 1 1 2 2 3 0 2 2 0 1 1 4 1 0 1 2 2 5 3 3 2 1 0 0 0 0 0 41
WESTINGHOUSE ELECTRIC CORP. 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 2 0 2 11 9 8 3 1 0 0 0 0 1 2 0 0 0 0 0 0 40
AIR PREHEATER COMPANY, INC. 0 1 6 3 8 6 3 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 28
UNITED STATES OF AMERICA, DEPARTMENT OF ENERGY 0 0 0 0 0 1 0 2 0 0 0 2 2 1 1 2 1 1 2 2 2 1 1 1 0 1 0 0 1 0 0 0 1 1 0 0 26
L. C. STEINMULLER GMBH 0 1 0 0 1 0 3 0 0 0 0 0 0 1 0 8 1 2 2 1 1 0 0 0 0 0 0 1 0 0 1 1 0 0 0 0 24
MARTIN GMBH FUR UMWELT- UND ENERGIETECHNIK 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 2 2 1 1 0 0 2 3 3 2 0 1 2 3 24
MITSUBISHI JUKOGYO KABUSHIKI KAISHA 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 3 1 0 1 1 1 1 2 1 2 0 3 3 1 3 0 0 0 0 24
GENERAL ELECTRIC COMPANY 0 1 1 1 6 3 3 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 1 1 2 23
HITACHI, LTD 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 3 0 2 0 0 1 0 1 0 0 0 2 1 0 2 2 2 1 0 20
VON ROLL AG 0 2 3 0 0 0 1 1 3 1 1 1 1 1 0 1 0 2 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 20
A. AHLSTROM CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 3 3 2 2 3 0 0 0 0 1 0 0 0 0 0 0 0 17
BABCOCK-HITACHI KABUSHIKI KAISHA 0 0 0 0 0 0 1 0 0 0 1 0 1 1 0 0 1 0 0 0 3 1 1 1 1 0 1 0 0 0 1 1 1 0 0 1 17
EBARA CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 1 2 2 1 0 0 0 1 0 3 2 3 0 0 0 17
SHELL OIL COMPANY 0 0 0 0 0 0 0 1 0 0 0 0 0 2 0 1 4 0 0 2 3 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 15
SIEMENS AKTIENGESELLSCHAFT 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 1 0 0 0 0 1 3 3 1 1 0 1 1 0 15
VON ROLL UMWELTTECHNIK 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 1 1 6 2 0 0 2 1 1 14
DORR-OLIVER INCORPORATED 0 1 2 0 0 0 2 0 1 1 2 1 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13
METALLGESELLSCHAFT AKTIENGESELLSCHAFT 0 0 0 1 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 2 1 1 0 1 0 1 2 0 0 1 0 0 0 0 0 0 13
PAUL WURTH S.A. 0 0 0 1 1 0 0 0 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 0 0 0 0 0 0 2 13
INSTITUTE OF GAS TECHNOLOGY 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 2 2 2 0 0 0 0 1 0 1 0 0 0 12
AIR PRODUCTS AND CHEMICALS, INC. 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 0 0 1 2 2 1 0 0 1 0 0 0 0 0 0 0 0 0 11
CONSOLIDATED NATURAL GAS SERVICE COMPANY, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 2 1 3 0 0 0 0 0 1 0 0 0 0 0 11
ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES CO., LTD. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 3 3 0 1 2 1 0 0 0 0 0 0 0 0 0 0 0 0 11
NICHOLS ENGINEERING & RESEARCH CORPORATION 1 1 1 0 0 0 1 0 3 1 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 11
AQUA-CHEM, INC. 0 0 1 0 0 3 0 0 0 0 0 0 0 2 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10
COMBUSTION POWER COMPANY, INC. 0 1 1 0 1 1 3 0 0 0 0 1 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10
DETROIT STOKER COMPANY 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 3 0 2 0 1 1 0 2 0 0 0 0 0 0 0 0 0 0 0 10
KERNFORSCHUNGSANLAGE JULICH GMBH 0 0 0 0 0 0 0 0 2 1 1 2 1 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10
ASEA-STAL AB 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 3 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9
JOHN ZINK COMPANY 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 2 0 0 1 3 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 3 1 1 0 9
MERKLE ENGINEERS, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 1 2 1 0 0 0 0 0 0 0 0 1 0 0 1 0 0 9
MITSUBISHI HEAVY INDUSTRIES, 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 1 3 1 2 1 1 9
MORSE BOULGER, INC 0 0 0 2 0 0 1 0 0 2 0 0 0 0 0 1 0 0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9
NKK CORPORATION 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 0 0 0 0 0 1 1 2 1 0 0 9
ATLANTIC RICHFIELD COMPANY 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 8
COAL INDUSTRY (PATENTS) LIMITED 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8
HITACHI ZOSEN CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 2 0 0 0 1 2 1 0 0 0 0 8
KAWASAKI JUKOGYO KABUSHIKI KAISHA 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 2 1 1 0 1 0 0 0 0 0 0 0 0 0 8
MOBIL OIL CORP. 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 0 0 0 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 8
STEAG AKTIENGESELLSCHAFT 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 3 1 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 8
DEUTSCHE BABCOCK AKTIENGESELLSCHAFT 0 0 0 0 0 0 0 0 0 0 0 1 1 1 2 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7
ENVIRONMENTAL CONTROL PRODUCTS, INC. 0 1 0 1 0 1 1 1 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 7
HAGAN INDUSTRIES INCORPORATED 1 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 0 0 0 7
NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 2 7
PRAXAIR TECHNOLOGY, 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 0 1 0 1 0 0 0 1 0 0 7
RILEY STOKER CORPORATION 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 0 0 1 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 7
TRW INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7
UNITED STATES OF AMERICA, ENVIRONMENTAL PROTECTION AGENCY 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 7
UNITED STATES OF AMERICA, NAVY 1 0 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 7
WEYERHAEUSER COMPANY 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 2 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 2 7
ABB CARBON AB 0 0 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 1 1 0 1 1 0 0 6
ABB STAL AB 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 1 1 1 0 1 0 0 0 0 0 0 0 0 6
ALSTOM (SWITZERLAND) 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 3 3 0 6
ALSTOM POWER 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 3 3 0 0 0 6
ASEA BROWN BOVERI AKTIENGESELLSCHAFT 0 0 0 0 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 1 0 2 0 0 0 6
ELECTRIC POWER RESEARCH INSTITUTE, INC. 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 1 0 0 0 0 3 0 0 0 0 6
ENVIROTECH CORPORATION 0 0 0 0 0 0 0 1 1 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 6
EXXON RESEARCH + ENGINEERING CO. 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 1 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 6
FOSTER WHEELER CORPORATION 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 2 2 0 0 0 6
GEC ALSTHOM STEIN INDUSTRIE 0 0 0 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 2 2 0 0 0 0 6
GENERAL MOTORS CORPORATION 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 2 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 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 0 1 0 0 0 2 1 0 0 0 0 0 1 6
JOSEF MARTIN FEUERUNGSBAU GMBH 0 0 0 0 0 1 0 2 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 6
KABUSHIKI KAISHA TAKUMA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
KLOCKNER-HUMBOLDT-DEUTZ AKTIENGESELLSCHAFT 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 1 0 0 0 0 1 0 1 0 0 0 0 0 0 0 6
KOPPERS COMPANY INC. 0 2 0 0 0 3 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 6
MIDLAND-ROSS CORPORATION 1 0 2 0 1 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
NGK INSULATORS LTD. 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 1 0 0 0 6
PHILLIPS PETROLEUM COMPANY 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
REGENERATIVE ENVIRONMENTAL EQUIPMENT CO., INC. 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 2 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
SAARBERGWERKE AG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 1 2 1 0 0 0 0 0 0 0 0 0 0 0 6
STERLING DRUG INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
SURE ALLOY STEEL 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 1 0 0 0 0 0 1 3 1 0 0 6
UNION CARBIDE CORPORATION 0 0 0 0 1 1 0 0 0 1 0 0 2 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
VEREINIGTE KESSELWERKE AKTIENGESELLSCHAFT 2 0 2 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
WORMSER ENGINEERING, INC. 0 0 0 0 0 0 0 0 1 0 0 0 4 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
AB GOTAVERKEN 1 1 0 0 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 0 0 0 0 5
ALCOA INC. 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
ANTHONY ROSS COMPANY 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 2 0 0 0 0 0 0 0 0 0 0 5
BABCOCK LENTJES KRAFTWERKSTECHNIK 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 2 2 1 0 0 0 0 0 5
CLEAR AIR, INC. 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
DEUTSCHE BABCOCK ANLAGEN AG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 5
ENERGY AND ENVIRONMENTAL RESEARCH CORP. 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 1 0 1 0 0 2 0 0 0 0 0 5
ENERGY PRODUCTS OF IDAHO 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 5
F. L. SMIDTH & CO. A/S 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 1 0 0 0 0 1 0 0 0 5
GENERAL SIGNAL CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 5
INTERNATIONAL TECHNOLOGY CORPORATION 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 1 0 1 1 0 0 0 0 0 5
KELLEY COMPANY, INC. 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
PHOENIX ENVIRONMENTAL LTD. 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 1 0 0 0 0 0 0 0 0 0 0 5
PYRO-MAGNETICS CORPORATION 0 1 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 0 0 0 0 0 0 0 0 5
RAYTHEON COMPANY 0 0 0 0 2 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 0 0 0 0 5
ROLLINS ENVIRONMENTAL SERVICES, 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 1 2 1 1 0 0 0 0 0 0 0 0 5
STEIN INDUSTRIES, INC. 0 0 1 0 1 0 0 1 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 5
TEMPERATURE ADJUSTERS, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 5
THERMOSELECT AKTIENGESELLSCHAFT 0 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 0 0 0 1 0 2 0 0 0 5
WILLIAMS PATENT CRUSHER AND PULVERIZER COMPANY 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 5
YORK-SHIPLEY, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5


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