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U.S. PATENT AND TRADEMARK OFFICE
Patent Technology Monitoring Team (PTMT)

Patenting In Technology Classes,
Breakout By Organization

Count of 2007 - 2011 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 175, Boring or Penetrating the Earth

( 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 2007 2008 2009 2010 2011 Total
~INDIVIDUALLY OWNED PATENT 53 47 58 67 37 262
BAKER HUGHES INCORPORATED 22 20 35 55 70 202
SMITH INTERNATIONAL INC. 23 40 21 50 36 170
SCHLUMBERGER TECHNOLOGY CORPORATION 11 12 10 32 48 113
HALLIBURTON ENERGY SERVICES, INC. 16 19 17 7 17 76
U.S. SYNTHETIC CORPORATION 0 0 8 8 16 32
SHELL OIL COMPANY 10 11 5 3 1 30
WEATHERFORD/LAMB, INC. 11 4 1 8 5 29
LONGYEAR TM, INC. 0 0 1 5 17 23
CHARLES MACHINE WORKS, INC. 4 9 4 2 2 21
VARCO I/P, INC. 5 5 5 2 1 18
SANDVIK INTELLECTUAL PROPERTY AB 6 4 2 2 2 16
ATLAS COPCO ROCK DRILLS AB 0 1 0 5 7 13
BAUER MASCHINEN GMBH 4 1 3 2 3 13
HILTI AKTIENGESELLSCHAFT 3 0 8 1 1 13
MERLIN TECHNOLOGY, INC. 5 1 2 2 3 13
NATIONAL-OILWELL VARCO, L.P. 0 0 3 4 6 13
TESCO CORP 0 2 5 4 2 13
VERMEER MANUFACTURING COMPANY, INC. 3 1 2 5 2 13
M-I L.L.C 1 2 1 4 2 10
WESTERN WELL TOOL, INC. 3 3 3 1 0 10
KENNAMETAL INC. 3 0 1 1 3 8
PDTI HOLDINGS, LLC 0 0 0 3 5 8
APS TECHNOLOGY, INC. 2 2 0 2 1 7
J. H. FLETCHER & CO., INC. 0 5 1 0 1 7
PATHFINDER ENERGY SERVICES, INC. 3 4 0 0 0 7
SANDVIK MINING AND CONSTRUCTION OY 0 1 1 3 2 7
TRACTO-TECHNIK GMBH 2 2 0 0 3 7
WWT INTERNATIONAL, INC. 0 0 0 2 5 7
"ALWAG" TUNNELAUSBAU GESELLSCHAFT M.B.H 4 1 0 0 1 6
ATLAS COPCO SECOROC LLC 0 1 0 2 3 6
NATIONAL-OILWELL, L.P. 5 1 0 0 0 6
ATBALANCE AMERICAS LLC 0 2 1 1 1 5
EAGLE ROCK MANUFACTURING, LLC 0 0 4 1 0 5
INTELLISERV, INC. 5 0 0 0 0 5
OMNI IP LTD 0 0 0 4 1 5
PARTICLE DRILLING TECHNOLOGIES, INC. 0 4 1 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
selected PTMT files available for download at : http://www.uspto.gov/web/offices/ac/ido/oeip/taf/data/


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