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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 - 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 279, Chucks or Sockets

( 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 2008 Total
~INDIVIDUALLY OWNED PATENT 19 23 20 21 28 19 15 12 10 17 6 21 18 5 9 9 19 24 20 11 14 16 19 18 16 16 15 13 10 14 19 12 19 12 15 3 16 7 2 1 583
POWER TOOL HOLDERS, 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 3 7 2 16 11 6 11 9 10 5 0 0 0 0 80
BLACK & DECKER INC. 2 0 0 1 0 0 0 1 1 0 2 0 4 0 0 0 1 0 1 0 1 0 1 0 1 0 0 0 0 0 1 2 3 2 3 1 1 0 5 6 40
ROHM 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 4 1 5 8 1 9 0 1 1 30
HILTI AKTIENGESELLSCHAFT 0 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 3 3 2 1 0 1 0 1 0 0 0 2 1 0 1 0 0 3 0 2 1 1 1 26
HARDINGE BROTHERS INC. 0 1 1 4 3 2 1 1 0 0 0 0 2 1 1 1 0 0 0 0 1 0 0 2 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 24
ROBERT BOSCH GMBH 0 0 0 1 2 0 1 1 1 3 0 0 2 0 0 0 0 0 0 0 0 0 1 1 0 1 1 0 0 0 1 1 1 1 2 0 1 0 2 0 24
PAUL FORKARDT KOMMANDITGESELLSCHAFT 4 3 1 5 0 2 3 0 1 1 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 23
ERICKSON TOOL COMPANY 5 4 2 1 3 3 2 0 0 0 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 0 0 0 0 22
JACOBS CHUCK TECHNOLOGY CORPORATION 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 4 6 7 1 0 0 0 0 0 0 0 0 0 0 0 0 21
HOUDAILLE INDUSTRIES, INC. 2 0 2 3 3 2 0 0 0 1 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 0 0 0 0 0 14
SMW SCHNEIDER & WEISSHAUPT GMBH 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 3 4 2 2 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14
JACOBS MANUFACTURING COMPANY LIMITED 0 0 0 0 1 2 1 2 0 4 1 1 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 0 0 13
XEROX 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 4 1 1 0 4 2 1 0 0 0 0 0 0 0 0 13
YUKIWA SEIKO KABUSHIKI KAISHA 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 1 1 0 0 1 2 0 1 1 3 0 1 0 12
KENNAMETAL INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 2 1 1 0 1 1 0 0 0 0 0 0 2 0 11
S-P MANUFACTURING CORPORATION 4 0 1 0 0 0 1 1 0 0 0 0 0 0 0 0 2 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11
SHEFFER COLLET COMPANY 0 0 0 0 0 0 0 0 0 1 0 2 0 1 2 0 0 1 2 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11
WOODWORTH, N. A., COMPANY 6 1 3 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 0 0 0 0 0 0 0 11
BUCK TOOL COMPANY 1 1 0 0 2 2 0 1 1 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 0 0 0 0 0 10
GLEASON WORKS 3 1 1 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 10
CUSHMAN INDUSTRIES, INCORPORATED 0 0 2 0 2 1 0 0 1 0 0 0 0 1 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9
PAUL FORKARDT GMBH & CO. KG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 1 2 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9
HYDRA-LOCK CORPORATION 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 0 0 0 0 1 1 0 0 0 0 0 1 0 3 8
ILLINOIS TOOL WORKS INC. 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 2 0 0 0 0 0 1 1 0 0 0 0 0 8
WARNER + SWASEY COMPANY 1 0 1 0 0 1 1 1 0 0 1 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 8
CATERPILLAR INC. 0 2 5 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 0 7
INTERNATIONAL BUSINESS MACHINES CORPORATION 0 0 1 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 7
SANDVIK TOBLER S.A. 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 1 0 0 1 0 3 0 0 0 0 0 0 7
SHANDONG WEIDA MACHINERY 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 0 0 0 1 3 2 1 7
CHUM POWER MACHINERY 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 4 0 1 0 1 0 0 0 0 0 6
EMUGE-WERK RICHARD GLIMPEL FABRIK FUR PRAZISIONSWERKZEUGE VO 0 1 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 6
ESTABLISSEMENTS AMYOT S.A. 0 0 0 0 0 0 0 0 1 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 0 0 0 0 2 1 6
HOWA MACHINERY, LTD. 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 0 0 0 1 0 0 1 1 0 0 0 0 0 6
SMC 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 1 1 0 2 1 0 0 1 0 0 6
BRYANT GRINDER CORPORATION 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
DOUBLE E COMPANY, INC. 0 0 0 0 0 0 0 2 0 1 0 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 0 0 0 5
DUNHAM TOOL COMPANY, INC. 0 1 0 1 1 0 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 0 0 0 5
EMERSON ELECTRIC CO. 1 1 0 0 2 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 0 0 0 0 0 0 0 0 0 5
EROWA AG 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 0 0 0 0 0 0 2 0 0 0 0 1 1 5
JACOBS CHUCK MANUFACTURING 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 0 0 0 0 0 0 2 0 3 5
PRATT BURNERD INTERNATIONAL LIMITED 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
S-B POWER TOOL 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 1 0 0 1 0 0 1 0 1 1 0 0 0 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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