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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 2004 - 2008 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 2004 2005 2006 2007 2008 Total
LG ELECTRONICS INC. 6 4 7 12 21 50
~INDIVIDUALLY OWNED PATENT 14 10 11 6 9 50
ANEST IWATA CORPORATION 4 3 9 9 8 33
SCROLL TECHNOLOGIES, INC. 7 5 1 7 4 24
SANYO ELECTRIC CO., LTD. 3 2 4 5 8 22
DAIKIN INDUSTRIES LIMITED 0 6 2 2 5 15
HITACHI, LTD 2 1 3 3 6 15
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI 5 2 3 3 2 15
CARRIER CORPORATION 7 2 4 1 0 14
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 1 3 1 4 5 14
TECUMSEH PRODUCTS COMPANY 5 2 4 1 2 14
SAMSUNG ELECTRONICS CO., LTD. 1 3 3 5 1 13
SANDEN CORPORATION 3 0 0 6 3 12
EMERSON CLIMATE TECHNOLOGIES, INC. 0 0 0 3 7 10
PARKER-HANNIFIN CORPORATION 6 1 0 2 0 9
DENSO CORPORATION 3 0 1 3 1 8
EATON CORPORATION 5 0 1 1 0 7
HONDA GIKEN KOGYO KABUSHIKI KAISHA (HONDA MOTOR CO., LTD.) 1 1 3 1 0 6
MITSUBISHI HEAVY INDUSTRIES, LTD. 3 1 0 0 2 6
RECHI PRECISION CO., LTD. 4 1 1 0 0 6
SAUER-DANFOSS (NORDBERG) A/S 3 2 0 0 1 6
1564330 ONTARIO, INC. 0 1 2 1 1 5
COPELAND CORPORATION 3 0 1 1 0 5
VARIAN, INC. 1 1 0 3 0 5


PTMT Contacts

Questions regarding these reports should be directed to:

U.S. Patent and Trademark Office
Electronic Information Products Division - PTMT
P.O Box 1450
Alexandria VA 22313-1450

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

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


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