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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 - 2007 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 055, Gas Separation

( 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 Total
~INDIVIDUALLY OWNED PATENT 14 19 20 20 29 31 35 23 16 18 26 23 27 18 13 19 20 19 23 25 27 23 30 31 28 9 15 25 17 35 36 28 33 24 30 29 16 21 18 913
DONALDSON COMPANY, INC. 1 0 3 2 3 1 1 0 0 0 7 7 3 4 1 3 6 1 4 2 2 3 1 0 3 1 4 4 7 10 11 9 9 9 9 6 6 10 13 166
AMERICAN AIR FILTER COMPANY, INC. 7 6 6 2 8 4 2 4 4 3 3 1 12 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 64
FILTERWERK MANN + HUMMEL GMBH 0 0 0 0 0 0 0 0 0 0 1 3 0 0 0 0 0 2 0 0 0 0 3 4 0 0 1 1 2 5 3 5 6 2 8 3 2 0 0 51
SAMSUNG KWANG-JU ELECTRONICS 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 3 13 4 4 10 10 44
NGK INSULATORS LTD. 0 0 0 0 0 0 0 0 0 0 0 0 1 2 0 0 0 0 0 1 2 0 1 0 1 0 1 2 4 2 0 0 0 1 0 2 3 7 6 36
GENERAL MOTORS CORPORATION 2 0 2 0 0 0 0 1 0 0 1 2 7 1 2 2 1 0 0 1 1 0 1 1 0 0 0 0 0 0 0 0 0 2 0 1 0 0 2 30
CARL FREUDENBERG 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 2 2 7 5 6 0 0 0 0 0 28
PALL CORPORATION 0 1 1 0 0 1 3 1 0 0 1 0 0 0 0 0 1 0 0 1 0 1 0 1 1 1 3 3 0 0 0 1 0 2 3 1 1 0 0 28
CORNING INCORPORATED 0 0 0 0 0 0 0 0 0 0 0 0 0 1 5 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 3 2 1 2 2 1 5 24
3M INNOVATIVE PROPERTIES 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 5 1 3 1 4 3 2 4 23
NELSON INDUSTRIES, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 1 4 9 4 0 0 0 0 23
NIPPONDENSO CO., LTD. 0 0 0 0 0 0 1 0 0 3 0 0 2 1 0 1 3 1 3 2 0 1 0 0 1 0 1 1 1 1 0 0 0 0 0 0 0 0 0 23
DANA 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 1 1 1 2 0 3 4 2 2 1 1 3 0 0 0 21
DELBAG-LUFTFILTER GMBH 0 2 6 2 2 3 1 0 0 0 0 2 1 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 21
BHA GROUP HOLDINGS, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 2 0 0 0 0 0 0 0 1 3 1 1 1 3 0 3 1 1 1 19
CARRIER CORPORATION 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 0 1 3 2 0 1 4 1 1 0 1 19
COMBUSTION ENGINEERING INC. 0 1 2 0 3 4 1 1 0 0 1 1 1 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 19
FLEETGUARD, 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 1 0 0 0 1 0 1 3 4 4 2 3 19
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 1 2 0 0 0 0 0 0 0 0 2 0 1 1 3 1 1 3 1 2 0 18
MINNESOTA MINING AND MANUFACTURING COMPANY 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 2 1 1 1 6 1 2 0 0 0 0 0 0 0 0 18
GENERAL ELECTRIC COMPANY 4 0 2 1 3 0 1 0 2 0 0 0 2 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 0 17
SHELL OIL COMPANY 1 1 0 1 1 0 0 1 0 0 0 0 0 0 0 0 0 2 0 1 1 1 0 0 1 1 0 0 0 1 1 0 0 0 0 0 1 1 1 17
STUDLEY PAPER COMPANY, INC. 8 2 2 0 2 0 2 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 17
WESTINGHOUSE ELECTRIC CORP. 0 0 1 1 1 1 0 0 1 0 0 0 0 2 0 0 1 3 2 1 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 17
THE HOOVER COMPANY 0 0 0 0 0 0 1 0 0 0 0 1 0 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 2 1 0 0 0 4 16
BABCOCK & WILCOX COMPANY 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 1 1 0 0 0 2 0 0 0 0 0 1 2 0 0 3 0 2 15
FARR COMPANY 0 1 1 1 0 4 0 0 0 0 1 0 0 3 0 0 0 0 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 15
AKTIEBOLAGET ELECTROLUX 1 1 0 0 2 1 1 0 0 0 0 0 3 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 14
ALLIED-SIGNAL INC. 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 4 3 1 2 2 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 14
INGERSOLL-RAND COMPANY 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 2 0 0 0 0 1 3 2 0 1 0 0 0 0 1 2 0 14
WHIRLPOOL CORPORATION 0 0 0 2 1 1 2 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 2 0 0 2 0 0 14
ALLIS-CHALMERS CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 0 4 1 1 5 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13
DEERE + COMPANY 1 0 0 0 0 1 0 0 0 0 1 1 1 0 0 1 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 13
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 0 0 2 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 1 0 0 1 0 1 0 0 0 0 0 0 3 13
NOTETRY LIMITED 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 2 0 0 3 0 0 0 0 0 2 3 0 1 1 0 0 0 0 0 13
FLANDERS FILTERS, INC. 1 1 0 0 0 0 0 1 0 1 0 1 0 0 0 0 1 2 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12
FOSTER WHEELER ENERGY INTERNATIONAL, INC. 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 1 1 3 1 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12
LG ELECTRONICS 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 2 3 2 1 1 3 12
MINE SAFETY APPLIANCES CO. 0 1 2 0 0 1 2 0 0 0 1 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 12
PNEUMAFIL CORPORATION 0 0 0 0 0 0 0 1 0 0 0 0 1 1 0 0 1 0 0 0 1 1 3 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 12
SIEMENS WESTINGHOUSE POWER 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 2 2 2 5 1 0 0 0 0 12
SUMITOMO ELECTRIC INDUSTRIES 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 1 2 0 2 4 2 0 0 1 0 0 0 0 12
UNITED TECHNOLOGIES CORPORATION 2 1 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 2 0 1 0 0 0 0 0 0 0 12
AAF INTERNATIONAL 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 2 0 2 5 1 1 0 0 0 0 0 11
AIR PREHEATER COMPANY, INC. 0 0 2 0 1 0 0 1 0 1 1 0 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 11
ANDREAS STIHL AG & CO. 0 0 0 0 0 0 0 0 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 1 3 11
AVCO CORPORATION 0 1 1 1 3 0 0 1 0 0 0 0 2 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 11
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 1 0 0 0 1 0 0 1 2 2 3 0 0 1 11
HONEYWELL INTERNATIONAL 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 1 3 0 1 1 1 3 1 11
MANN & HUMMEL 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 2 4 5 11
NIPPON SOKEN, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 5 2 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11
SINGER COMPANY 0 0 1 2 1 1 0 1 0 0 0 0 0 0 0 0 1 1 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11
VORWERK + CO. INTERHOLDING GMBH 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 2 1 0 0 3 0 1 0 0 1 1 0 0 0 0 0 0 0 0 11
DENSO 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 1 0 0 0 2 0 5 2 0 0 10
FLEX-KLEEN CORPORATION 0 0 0 0 0 1 1 1 0 0 0 0 2 0 0 4 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10
ROBERT BOSCH GMBH 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 2 1 0 10
TOYODA BOSHOKU 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 1 1 2 0 0 1 1 0 4 0 0 0 10
TOYOTA JIDOSHA K.K. 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 1 0 1 1 3 0 10
DYSON LIMITED 0 0 0 0 0 0 0 0 0 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 1 4 0 9
HOME CARE INDUSTRIES, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 1 0 1 0 3 2 0 0 0 0 0 0 0 0 0 9
KIORITZ CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 2 0 2 0 0 1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 9
LUWA AG 1 0 2 0 1 0 0 0 1 1 1 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 9
NORDSON CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 2 0 0 0 1 1 0 1 1 0 9
SAMSUNG ELECTRONICS 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 1 0 0 0 1 1 1 1 0 0 0 0 1 1 2 9
SCOTT + FETZER COMPANY 0 0 0 0 0 0 0 0 0 1 0 0 0 3 0 0 1 0 0 0 1 0 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9
SHOP-VAC CORPORATION 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 1 2 1 2 0 0 0 0 0 9
TOYO ROKI SEIZO KABUSHIKI KAISHA 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 0 0 0 0 0 0 1 2 0 3 1 0 0 9
AB SVENSKA FLAKTFABRIKEN 1 0 1 0 0 0 1 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 8
DAIMLER-BENZ AKTIENGESELLSCHAFT 0 0 0 0 1 0 0 0 1 0 0 1 0 2 0 0 0 0 0 0 0 0 0 1 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 8
EMERSON ELECTRIC CO. 0 0 0 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 2 0 1 1 0 1 0 0 0 1 8
FORD MOTOR COMPANY 3 0 2 0 1 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 0 0 0 0 0 0 0 0 8
MONSANTO COMPANY, INC. 0 0 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 0 0 8
ROLLS-ROYCE PLC 0 0 1 0 0 0 0 0 1 0 0 0 1 0 1 0 1 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 8
SIEMENS AKTIENGESELLSCHAFT 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 1 0 0 0 1 1 0 0 0 8
TENNANT COMPANY 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 2 0 0 0 0 1 8
UOP 2 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 1 0 1 0 0 2 0 0 0 8
W. L. GORE & ASSSOCIATES, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 2 1 0 1 2 0 1 0 0 0 0 0 0 0 0 0 8
CAMBRIDGE FILTER CORPORATION 0 1 1 0 1 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7
DAIKIN INDUSTRIES LIMITED 0 0 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 0 3 0 1 1 1 0 7
ENVIROTECH CORPORATION 0 0 0 0 1 2 0 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 7
G.B.D. CORP. 0 0 0 0 0 0 0 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 3 1 1 0 0 7
HELICAL DYNAMICS, 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 7 0 0 0 0 0 0 0 0 0 0 7
HEPA CORPORATION 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 0 0 1 0 3 0 1 0 0 0 0 7
HITACHI, LTD 1 0 1 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 7
HMI INDUSTRIES 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 1 2 1 0 0 0 1 1 0 0 1 0 7
NUSTEP TRENNDUSEN ENTWICKLUNGSUND PATENTVERWERTUNGSGESELLSCH 0 0 0 0 0 0 0 0 0 1 0 2 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 7
PHILLIPS PETROLEUM COMPANY 1 0 2 1 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 0 0 7
PPG INDUSTRIES INC. 0 0 0 0 1 2 3 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 7
ROCKWELL INTERNATIONAL CORPORATION 2 0 1 1 0 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 7
ROYAL APPLIANCE MANUFACTURING CO., INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0