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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 418, Rotary Expansible Chamber Devices

( 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 27 24 22 14 10 97
SCROLL TECHNOLOGIES, INC. 21 22 9 7 5 64
HITACHI, LTD 17 7 5 2 1 32
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI 0 1 15 5 2 23
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 10 5 4 1 3 23
CARRIER CORPORATION 4 3 6 7 2 22
LG ELECTRONICS INC. 4 4 4 6 4 22
MITSUBISHI HEAVY INDUSTRIES, LTD. 7 4 6 3 1 21
COPELAND CORPORATION 9 4 4 3 0 20
SANDEN CORPORATION 9 4 2 3 0 18
SANYO ELECTRIC CO., LTD. 4 2 3 3 2 14
DENSO CORPORATION 5 1 3 3 0 12
TECUMSEH PRODUCTS COMPANY 3 0 2 5 2 12
ANEST IWATA CORPORATION 3 0 1 4 3 11
RECHI PRECISION CO., LTD. 3 2 1 4 1 11
TOYODA JIDOSHOKKI SEISAKUSHO KABUSHIKI KAISHA 6 5 0 0 0 11
DAIKIN INDUSTRIES LIMITED 2 0 2 0 6 10
ROBERT BOSCH GMBH 1 1 6 1 1 10
PARKER-HANNIFIN CORPORATION 1 1 0 6 1 9
EATON CORPORATION 0 2 1 5 0 8
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, TAIWAN 4 2 2 0 0 8
THE BOC GROUP PLC 3 2 1 1 1 8
VAN DOORNE'S TRANSMISSIE B.V. 1 5 0 2 0 8
VISTEON GLOBAL TECHNOLOGIES, INC. 0 2 2 2 1 7
ATELIERS BUSCH S.A. 1 3 0 2 0 6
TAIKO KIKAI INDUSTRIES CO., LTD. 1 3 1 0 1 6
TOSHIBA CORPORATION 2 4 0 0 0 6
WHITE HYDRAULICS, INC. 2 2 1 0 1 6
BITZER KUEHLMASCHINENBAU GMBH & CO. KG 1 2 1 0 1 5
DELPHI TECHNOLOGIES, INC. 0 3 1 1 0 5
J. M. VOITH TURBO GMBH & CO. KG 1 1 3 0 0 5
LUK FAHRZEUG-HYDRAULIK GMBH & CO. KG 1 2 1 1 0 5
SAUER-DANFOSS (NORDBERG) A/S 0 0 0 3 2 5
TOKICO LTD. 3 0 1 1 0 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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