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

EXTENDED YEAR SET - Patenting In Technology Classes,
Breakout By Organization

Count of 1969 - 2015 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 494, Imperforate Bowl: Centrifugal Separators

( 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 2009 2010 2011 2012 2013 2014 2015 Total
~INDIVIDUALLY OWNED PATENT 15 3 9 9 9 11 11 11 9 7 10 9 7 6 1 3 4 2 5 6 7 3 6 2 7 8 3 4 5 8 7 6 7 8 2 3 3 2 3 0 4 1 6 5 2 4 1 264
WESTFALIA SEPARATOR AG 6 1 3 0 3 3 5 6 6 2 4 1 4 1 5 7 6 1 3 8 1 5 1 2 2 0 0 0 2 1 3 2 1 3 3 1 3 10 3 7 4 4 0 3 1 0 0 137
SMITHKLINE BECKMAN CORPORATION 4 1 2 0 3 1 1 5 7 6 6 7 7 8 6 5 5 1 3 3 4 3 2 2 1 2 6 5 1 3 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 113
ALFA-LAVAL AB 7 8 4 4 4 2 1 2 2 3 0 3 0 4 3 0 0 1 4 0 0 2 0 0 0 0 0 0 0 4 5 3 9 3 5 3 3 1 0 0 0 0 0 0 0 0 0 90
E. I. DU PONT DE NEMOURS AND COMPANY 0 0 0 0 0 0 2 5 1 3 1 2 0 1 5 5 3 7 7 4 1 2 2 0 2 5 2 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 68
BAXTER INTERNATIONAL INC. 0 0 1 1 0 0 0 1 1 12 3 4 2 1 2 0 1 0 1 1 0 2 1 1 3 1 0 6 1 2 2 1 4 2 3 1 4 1 0 0 0 0 0 0 0 0 0 66
HITACHI KOKI COMPANY, LIMITED 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 2 2 1 1 1 2 5 4 5 3 5 4 2 3 7 2 5 2 3 62
HAEMONETICS CORPORATION 0 0 0 1 0 1 0 0 0 0 0 0 3 0 6 2 0 0 0 1 1 2 2 1 1 0 1 2 1 0 1 0 0 1 3 3 0 0 0 1 0 0 0 0 0 0 0 34
ALFA-LAVAL SEPARATION AB 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 5 4 3 3 3 3 1 1 1 1 1 4 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 32
PENNWALT CORPORATION 1 3 6 0 4 3 1 1 2 0 2 0 1 2 1 1 0 1 1 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 32
KLOCKNER-HUMBOLDT-DEUTZ AKTIENGESELLSCHAFT 0 0 0 0 0 0 0 1 1 0 0 0 2 2 4 3 0 2 1 0 0 1 0 2 5 2 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29
ALFA LAVAL CORPORATE AB 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 2 3 2 1 1 1 5 4 3 5 28
COBE LABORATORIES, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 1 0 1 0 4 1 1 2 4 7 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 26
FLEETGUARD, 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 0 0 0 0 0 2 0 2 8 2 2 0 2 1 0 0 1 0 0 0 0 20
BAKER HUGHES INCORPORATED 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 2 3 7 4 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19
CARIDIANBCT, 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 6 9 1 0 0 0 18
TERUMO BCT, 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 4 3 7 18
UNITED STATES OF AMERICA, DEPARTMENT OF ENERGY 1 1 0 1 1 2 2 5 0 0 0 0 0 0 0 0 0 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 0 15
GAMBRO, 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 0 0 0 0 0 0 1 3 2 4 1 3 0 0 0 0 0 0 0 0 0 14
KENDRO LABORATORY PRODUCTS, 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 0 0 0 0 0 0 0 4 2 5 0 2 0 1 0 0 0 0 0 0 0 14
BIRD MACHINE COMPANY, INC. 1 1 0 1 0 1 0 0 0 2 0 1 0 2 1 1 0 0 0 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 13
DORR-OLIVER INCORPORATED 2 1 0 0 0 1 0 1 2 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12
GEA MECHANICAL EQUIPMENT 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 0 0 0 0 0 0 0 0 0 0 0 0 0 4 4 4 12
KABUSHIKI KAISHA KUBOTA SEISAKUSHO 0 0 0 0 0 0 0 0 0 2 0 2 0 3 0 2 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 12
KENSEY NASH 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 0 0 0 0 0 0 0 0 0 0 0 0 0 1 6 3 2 12
INTERNATIONAL BUSINESS MACHINES CORPORATION 0 1 0 0 1 0 0 0 2 1 0 0 0 1 2 3 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
BECKMAN COULTER, 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 0 0 0 0 1 2 1 2 0 1 0 1 0 0 0 0 0 0 0 1 1 10
GLACIER METAL COMPANY LIMITED 1 0 0 1 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10
HERAEUS-CHRIST GMBH 0 0 1 0 0 3 0 1 0 1 0 1 2 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 10
MANN & HUMMEL 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 0 0 0 0 0 0 1 1 1 1 1 0 1 2 0 1 9
MEDTRONIC 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 0 0 0 0 1 0 0 0 7 0 0 0 1 0 0 0 0 0 0 0 0 9
THOMAS BROADBENT & SONS LTD. 0 0 1 1 0 0 0 0 0 0 1 2 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 9
UNITED STATES OF AMERICA, DEPARTMENT OF HEALTH & HUMAN SERVICES 0 1 0 0 1 0 1 0 0 0 1 1 1 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 0 0 0 0 0 9
ALFA-LAVAL SEPARATION A/S 0 0 0 0 0 0 0 0 0 0 0 0 2 0 1 0 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8
FENWAL, 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 2 1 2 8
HENGST GMBH & CO. KG 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 0 0 1 1 1 4 0 0 0 0 8
KOBE, INC. 0 0 0 0 0 2 0 1 2 0 0 0 3 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 8
KRAUSS-MAFFEI AKTIENGESELLSCHAFT 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 2 1 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 8
TOMOE ENGINEERING 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 1 0 0 0 0 0 0 0 1 0 0 1 1 4 8
WAGNER DEVELOPMENT, 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 0 0 0 0 0 0 0 0 0 1 0 2 1 0 2 0 1 0 1 0 0 8
AGA AB 0 0 1 3 2 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 0 0 0 0 0 0 0 7
BECTON, DICKINSON AND COMPANY 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7
BMA BRAUNSCHWEIGISCHE MASCHINENBAUANSTALT AG 0 0 0 1 0 0 0 3 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 0 0 2 7
DE LAVAL SEPARATOR COMPANY 1 0 0 2 1 0 0 2 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 0 0 7
FRESENIUS AG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7
HANLAB 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 0 0 0 0 0 0 1 0 2 0 0 1 1 2 0 0 0 7
JOUAN 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 1 2 0 0 0 1 0 0 0 0 0 0 0 0 0 7
ROBATEL S.L.P.I. 0 0 0 0 1 0 0 0 0 0 1 1 2 0 0 0 0 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 7
THERMO ELECTRON LED 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 0 0 0 0 0 0 0 1 1 0 1 0 1 1 2 0 7
UNION CARBIDE CORPORATION 0 0 0 0 0 1 0 0 1 1 3 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 0 7
ZYMEQUEST, 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 0 0 0 0 0 0 0 0 0 0 1 3 0 2 0 1 0 0 0 0 0 7
ALFA-LAVAL, INC. 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 6
DIDECO S.P.A 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 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 6
ESCHER WYSS LIMITED 0 0 0 0 1 1 0 3 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 0 0 0 0 6
FIBERLITE CENTRIFUGE, LLC 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 0 0 0 0 0 0 6 0 0 0 6
FILTERWERK MANN + HUMMEL 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 0 2 1 2 1 0 0 0 0 0 0 0 0 0 0 0 6
HITACHI, LTD 0 0 0 1 0 1 0 0 0 0 0 1 0 1 0 0 1 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 0 0 0 6
KNELSON PATENTS 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 0 0 0 0 0 0 0 0 0 0 1 3 0 0 2 0 0 0 0 0 0 6
SORVALL, IVAN INC. 2 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
ALFA WASSERMANN, 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 0 0 1 5
ALFA-LAVAL SEPARATION, 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 3 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
AMERICAN HOSPITAL SUPPLY CORPORATION 1 0 0 0 1 2 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 0 0 0 0 0 0 0 0 0 0 0 0 0 5
BAKER PERKINS INC. 0 1 0 0 0 0 2 0 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 0 0 0 0 0 0 0 0 0 0 0 0 0 5
BIOMET BIOLOGICS, LLC 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 0 0 0 0 0 1 1 1 1 1 5
COMMISSARIAT A L'ENERGIE ATOMIQUE 1 0 0 1 0 0 1 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 0 0 1 0 0 0 0 0 0 0 0 0 5
DAMON CORPORATION 0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 1 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 0 0 5
EPPENDORF AG 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 1 1 0 0 0 0 0 0 0 0 2 5
MASCHINENFABRIK BUCKAU R. WOLF AKTIENGESELLSCHAFT 0 0 0 1 0 2 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 0 0 0 0 0 0 0 0 0 0 0 5
PIRAMOON TECHNOLOGIES, 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 0 2 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
TSUKISHIMA KIKAI CO., LTD. 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
VARCO I/P, 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 0 0 0 0 0 0 0 0 0 2 0 1 0 0 2 0 0 0 0 0 0 5


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