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

Patenting In Technology Classes,
Breakout By Organization

Count of 2001 - 2005 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 2001 2002 2003 2004 2005 Total
~Individually Owned Patent 33 24 30 29 16 132
DONALDSON COMPANY, INC. 9 9 9 6 6 39
SAMSUNG KWANG-JU ELECTRONICS CO., LTD. 0 3 13 4 4 24
FILTERWERK MANN + HUMMEL GMBH 6 2 8 3 2 21
NELSON INDUSTRIES, INC. 4 9 4 0 0 17
3M INNOVATIVE PROPERTIES COMPANY 1 3 1 4 3 12
FLEETGUARD, INC. 0 1 3 4 4 12
CARL FREUDENBERG 5 6 0 0 0 11
CORNING INCORPORATED 3 2 1 2 2 10
DENSO CORPORATION 0 2 0 5 2 9
HONDA GIKEN KOGYO KABUSHIKI KAISHA (HONDA MOTOR CO., LTD.) 3 1 1 3 1 9
BHA GROUP HOLDINGS, INC. 1 3 0 3 1 8
EBARA CORPORATION 1 2 2 3 0 8
LG ELECTRONICS INC. 0 2 3 2 1 8
SIEMENS WESTINGHOUSE POWER CORPORATION 2 5 1 0 0 8
ANDREAS STIHL AG & CO. 1 2 2 1 1 7
CARRIER CORPORATION 0 1 4 1 1 7
DANA CORPORATION 2 1 1 3 0 7
PALL CORPORATION 0 2 3 1 1 7
TOYO ROKI SEIZO KABUSHIKI KAISHA 1 2 0 3 1 7
BABCOCK & WILCOX COMPANY 1 2 0 0 3 6
G.B.D. CORP. 0 1 3 1 1 6
HONEYWELL INTERNATIONAL INC. 3 0 1 1 1 6
NGK INSULATORS LTD. 0 1 0 2 3 6
ROBERT BOSCH GMBH 0 0 2 2 2 6
THE HOLMES GROUP, INC. 1 2 1 1 1 6
TOYODA BOSHOKU CORPORATION 1 1 0 4 0 6
DAIKIN INDUSTRIES LIMITED 0 3 0 1 1 5
DYSON LIMITED 0 1 1 2 1 5


PTMB Contacts

Questions regarding these reports should be directed to:

U.S. Patent and Trademark Office
Electronic Information Products Division - PTMB
MDW 4C18; P.O Box 1450
Alexandria VA 22313-1450

tel: (571) 272-5600
fax: (571) 273-0110
email: oeip@uspto.gov

address of PTMB pages at the USPTO Web Site: http://www.uspto.gov/web/offices/ac/ido/oeip/taf/tafp.html
ftp download of selected PTMB reports and materials from : ftp.uspto.gov/pub/taf/


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