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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 2000 - 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 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 2000 2001 2002 2003 2004 Total
~Individually Owned Patent 31 27 24 22 14 118
SCROLL TECHNOLOGIES, INC. 11 21 22 9 7 70
HITACHI, LTD 7 17 7 5 2 38
CARRIER CORPORATION 13 4 3 6 7 33
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 13 10 5 4 1 33
SANDEN CORPORATION 13 9 4 2 3 31
MITSUBISHI HEAVY INDUSTRIES, LTD. 7 7 4 6 3 27
COPELAND CORPORATION 6 9 4 4 3 26
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI 0 0 1 15 5 21
LG ELECTRONICS INC. 1 4 4 4 6 19
EATON CORPORATION 10 0 2 1 5 18
SANYO ELECTRIC CO., LTD. 6 4 2 3 3 18
DENSO CORPORATION 5 5 1 3 3 17
TECUMSEH PRODUCTS COMPANY 6 3 0 2 5 16
ROBERT BOSCH GMBH 4 1 1 6 1 13
RECHI PRECISION CO., LTD. 2 3 2 1 4 12
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, TAIWAN 3 4 2 2 0 11
TOYODA JIDOSHOKKI SEISAKUSHO KABUSHIKI KAISHA 0 6 5 0 0 11
ANEST IWATA CORPORATION 1 3 0 1 4 9
ATELIERS BUSCH S.A. 3 1 3 0 2 9
LUK FAHRZEUG-HYDRAULIK GMBH & CO. KG 4 1 2 1 1 9
PARKER-HANNIFIN CORPORATION 1 1 1 0 6 9
VAN DOORNE'S TRANSMISSIE B.V. 1 1 5 0 2 9
DAIKIN INDUSTRIES LIMITED 4 2 0 2 0 8
J. M. VOITH TURBO GMBH & CO. KG 3 1 1 3 0 8
THE BOC GROUP PLC 1 3 2 1 1 8
TOSHIBA CORPORATION 2 2 4 0 0 8
WHITE HYDRAULICS, INC. 3 2 2 1 0 8
MITSUBISHI DENKI KABUSHIKI KAISHA 3 0 0 2 2 7
UNISIA JECS CORPORATION 5 0 0 2 0 7
DANFOSS A/S 3 1 0 2 0 6
GENERAL MOTORS CORPORATION 3 1 1 1 0 6
VISTEON GLOBAL TECHNOLOGIES, INC. 0 0 2 2 2 6
DELPHI TECHNOLOGIES, INC. 0 0 3 1 1 5
TAIKO KIKAI INDUSTRIES CO., LTD. 0 1 3 1 0 5
TOKICO LTD. 0 3 0 1 1 5


PTMD Contacts

Questions regarding these reports should be directed to:

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

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

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


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