~Individually Owned Patent |
271 |
310 |
245 |
206 |
208 |
1240 |
BAXTER INTERNATIONAL INC. |
12 |
13 |
10 |
7 |
5 |
47 |
U.S. FILTER CORPORATION |
11 |
6 |
13 |
5 |
7 |
42 |
PALL CORPORATION |
9 |
9 |
9 |
2 |
8 |
37 |
INSTITUT FRANCAIS DU PETROLE |
13 |
7 |
6 |
3 |
3 |
32 |
ZENON ENVIRONMENTAL INC. |
4 |
8 |
6 |
7 |
7 |
32 |
NALCO CHEMICAL COMPANY |
14 |
13 |
4 |
0 |
0 |
31 |
TRANSGENOMIC INCORPORATED |
8 |
4 |
11 |
6 |
0 |
29 |
DANA CORPORATION |
6 |
8 |
5 |
3 |
6 |
28 |
FILTERWERK MANN + HUMMEL GMBH |
2 |
3 |
3 |
11 |
4 |
23 |
FLEETGUARD, INC. |
2 |
5 |
2 |
11 |
2 |
22 |
PARKER-HANNIFIN CORPORATION |
7 |
7 |
2 |
3 |
3 |
22 |
UNIVERSITY OF CALIFORNIA, THE REGENTS OF |
9 |
0 |
6 |
3 |
3 |
21 |
ARCHIMEDES TECHNOLOGY GROUP, INC. |
1 |
8 |
0 |
3 |
7 |
19 |
BAKER HUGHES INCORPORATED |
9 |
5 |
0 |
3 |
2 |
19 |
CUNO INC. |
4 |
4 |
3 |
2 |
5 |
18 |
SHARP KABUSHIKI KAISHA (SHARP CORPORATION) |
2 |
5 |
5 |
3 |
3 |
18 |
WATERS INVESTMENTS LIMITED |
2 |
3 |
4 |
4 |
5 |
18 |
FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH |
5 |
2 |
3 |
2 |
5 |
17 |
MILLIPORE CORPORATION |
4 |
3 |
2 |
0 |
8 |
17 |
NITTO DENKO CORPORATION |
2 |
3 |
5 |
3 |
4 |
17 |
DEGREMONT S.A. |
6 |
6 |
2 |
1 |
1 |
16 |
EASTMAN KODAK COMPANY |
4 |
3 |
2 |
3 |
4 |
16 |
KURITA WATER INDUSTRIES LTD. |
6 |
2 |
4 |
3 |
1 |
16 |
SARTORIUS AG |
2 |
6 |
4 |
4 |
0 |
16 |
DAICEL CHEMICAL INDUSTRIES LTD. |
3 |
4 |
3 |
4 |
1 |
15 |
TORAY INDUSTRIES INC. |
1 |
4 |
5 |
4 |
1 |
15 |
UOP |
4 |
3 |
5 |
1 |
1 |
14 |
DONALDSON COMPANY, INC. |
5 |
5 |
1 |
0 |
2 |
13 |
GENERAL ELECTRIC COMPANY |
0 |
4 |
4 |
2 |
3 |
13 |
USF FILTRATION AND SEPARATIONS GROUP INC. |
7 |
5 |
0 |
1 |
0 |
13 |
ACCESS BUSINESS GROUP INTERNATIONAL LLC |
0 |
0 |
1 |
4 |
7 |
12 |
BASF AKTIENGESELLSCHAFT |
3 |
4 |
0 |
1 |
4 |
12 |
DYAX CORP. |
7 |
3 |
2 |
0 |
0 |
12 |
HITACHI, LTD |
6 |
3 |
1 |
1 |
1 |
12 |
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE |
2 |
7 |
1 |
2 |
0 |
12 |
MYKROLIS CORPORATION |
0 |
1 |
3 |
6 |
2 |
12 |
ORGANO CORPORATION |
1 |
4 |
6 |
1 |
0 |
12 |
SYMYX TECHNOLOGIES, INC. |
0 |
1 |
8 |
0 |
3 |
12 |
ASAHI KASEI KOGYO KABUSHIKI KAISHA |
4 |
3 |
3 |
1 |
0 |
11 |
BAYER AKTIENGESELLSCHAFT |
3 |
1 |
6 |
0 |
1 |
11 |
EBARA CORPORATION |
3 |
0 |
2 |
2 |
4 |
11 |
FANTOM TECHNOLOGIES INC. |
1 |
6 |
3 |
1 |
0 |
11 |
FUJI PHOTO FILM CO., LTD |
2 |
4 |
3 |
2 |
0 |
11 |
ISCO, INC. |
4 |
5 |
0 |
1 |
1 |
11 |
SANDIA CORPORATION |
3 |
0 |
2 |
0 |
6 |
11 |
SHELL OIL COMPANY |
1 |
1 |
2 |
2 |
5 |
11 |
AGILENT TECHNOLOGIES, INC. |
1 |
3 |
2 |
1 |
3 |
10 |
AMERSHAM PHARMACIA BIOTECH AB |
2 |
4 |
3 |
1 |
0 |
10 |
DELPHI TECHNOLOGIES, INC. |
0 |
0 |
3 |
2 |
5 |
10 |
E. I. DU PONT DE NEMOURS AND COMPANY |
1 |
4 |
1 |
0 |
4 |
10 |
NELSON INDUSTRIES, INC. |
1 |
2 |
3 |
3 |
1 |
10 |
ONDEO NALCO COMPANY |
0 |
0 |
2 |
4 |
4 |
10 |
OUTOKUMPU OYJ |
0 |
2 |
1 |
3 |
4 |
10 |
SANYO ELECTRIC CO., LTD. |
2 |
0 |
4 |
1 |
3 |
10 |
ALLIED-SIGNAL INC. |
3 |
3 |
2 |
1 |
0 |
9 |
AMERSHAM BIOSCIENCES AB |
0 |
0 |
0 |
5 |
4 |
9 |
ARVIN TECHNOLOGIES, INC. |
0 |
0 |
1 |
2 |
6 |
9 |
BATTELLE MEMORIAL INSTITUTE |
2 |
1 |
2 |
1 |
3 |
9 |
BETZDEARBORN INC. |
7 |
2 |
0 |
0 |
0 |
9 |
CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED |
3 |
1 |
2 |
1 |
2 |
9 |
CORNING INCORPORATED |
3 |
4 |
2 |
0 |
0 |
9 |
HEMASURE, INC. |
5 |
3 |
1 |
0 |
0 |
9 |
HONEYWELL INTERNATIONAL INC. |
1 |
0 |
3 |
3 |
2 |
9 |
HYDROTREAT, INC. |
0 |
1 |
0 |
2 |
6 |
9 |
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, TAIWAN |
2 |
3 |
2 |
0 |
2 |
9 |
INNOVA/PURE WATER INC. |
3 |
3 |
0 |
3 |
0 |
9 |
KIMBERLY-CLARK WORLDWIDE, INC. |
0 |
3 |
3 |
2 |
1 |
9 |
MITSUBISHI RAYON CO., LTD. |
0 |
5 |
2 |
2 |
0 |
9 |
SHIMADZU CORPORATION |
3 |
2 |
1 |
2 |
1 |
9 |
AKZO NOBEL NV |
1 |
2 |
1 |
1 |
3 |
8 |
ASAHI MEDICAL CO., LTD. |
2 |
1 |
3 |
1 |
1 |
8 |
BALDWIN FILTERS, INC. |
0 |
2 |
2 |
3 |
1 |
8 |
BERGER INSTRUMENTS, INC. |
0 |
0 |
2 |
5 |
1 |
8 |
COMMISSARIAT A L'ENERGIE ATOMIQUE |
1 |
2 |
2 |
2 |
1 |
8 |
DIALYSIS SYSTEMS, INC. |
0 |
5 |
0 |
3 |
0 |
8 |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. |
1 |
0 |
1 |
3 |
3 |
8 |
HOSPAL INDUSTRIES (S.A.) |
3 |
3 |
1 |
0 |
1 |
8 |
MEDTRONIC INC. |
1 |
0 |
0 |
2 |
5 |
8 |
NEPHROS, INC. |
0 |
2 |
2 |
1 |
3 |
8 |
PARKER HANNIFIN OY |
0 |
3 |
1 |
3 |
1 |
8 |
SHINKO PANTEC COMPANY, LIMITED |
4 |
2 |
2 |
0 |
0 |
8 |
STANADYNE CORPORATION |
0 |
0 |
5 |
1 |
2 |
8 |
TEXACO INC. |
4 |
0 |
0 |
3 |
1 |
8 |
UNITED STATES OF AMERICA, NAVY |
0 |
4 |
0 |
1 |
3 |
8 |
ABTECH INDUSTRIES, INC. |
4 |
1 |
0 |
1 |
1 |
7 |
AQUA-AEROBIC SYSTEMS INC. |
3 |
1 |
0 |
1 |
2 |
7 |
ASHLAND INC. |
1 |
0 |
0 |
4 |
2 |
7 |
BECHTEL BWXT IDAHO, LLC |
2 |
1 |
1 |
2 |
1 |
7 |
COCA-COLA COMPANY |
0 |
2 |
3 |
1 |
1 |
7 |
COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH |
1 |
0 |
0 |
4 |
2 |
7 |
DOW CHEMICAL COMPANY |
1 |
3 |
3 |
0 |
0 |
7 |
HYDAC FILTERTECHNIK GMBH |
1 |
0 |
1 |
2 |
3 |
7 |
IONICS, INC. |
0 |
1 |
0 |
4 |
2 |
7 |
KIONIX, INC. |
0 |
1 |
4 |
0 |
2 |
7 |
LANCER PARTNERSHIP LTD. |
0 |
0 |
1 |
2 |
4 |
7 |
MAHLE FILTERSYSTEME GMBH |
0 |
0 |
1 |
2 |
4 |
7 |
MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG |
1 |
1 |
2 |
2 |
1 |
7 |
NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO |
1 |
0 |
2 |
1 |
3 |
7 |
NIPRO CORPORATION |
0 |
2 |
0 |
4 |
1 |
7 |
PROCTER + GAMBLE COMPANY |
0 |
0 |
2 |
4 |
1 |
7 |
SUEZ-LYONNAISE DES EAUX |
0 |
3 |
1 |
3 |
0 |
7 |
3M INNOVATIVE PROPERTIES COMPANY |
2 |
0 |
1 |
2 |
1 |
6 |
ADVION BIOSCIENCES, INC. |
0 |
0 |
0 |
1 |
5 |
6 |
AGRIMOND, L.L.C. |
0 |
1 |
2 |
3 |
0 |
6 |
ALLTECH ASSOCIATES, INC. |
0 |
2 |
0 |
2 |
2 |
6 |
AMCOL INTERNATIONAL CORPORATION |
0 |
1 |
4 |
0 |
1 |
6 |
ASHBROOK CORPORATION |
0 |
2 |
1 |
2 |
1 |
6 |
BASF CORP. |
1 |
0 |
2 |
1 |
2 |
6 |
BUCHER-GUYER AG MASCHINENFABRIK |
2 |
2 |
2 |
0 |
0 |
6 |
CATERPILLAR INC. |
4 |
0 |
1 |
0 |
1 |
6 |
CLEARLINE SYSTEMS, INC. |
1 |
3 |
1 |
1 |
0 |
6 |
DEGUSSA AKTIENGESELLSCHAFT |
0 |
1 |
1 |
2 |
2 |
6 |
DEXTER MAGNETIC TECHNOLOGIES, INC. |
0 |
0 |
2 |
4 |
0 |
6 |
DIONEX CORPORATION |
2 |
1 |
0 |
2 |
1 |
6 |
ENVIROQUIP, INC. |
2 |
1 |
1 |
0 |
2 |
6 |
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY |
0 |
0 |
0 |
2 |
4 |
6 |
GAMBRO AB |
3 |
1 |
2 |
0 |
0 |
6 |
IBC ADVANCED TECHNOLOGIES, INC. |
1 |
0 |
1 |
3 |
1 |
6 |
KINETICO, INC. |
2 |
1 |
2 |
0 |
1 |
6 |
KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY |
0 |
2 |
2 |
1 |
1 |
6 |
KOSLOW TECHNOLOGIES CORPORATION |
0 |
0 |
0 |
3 |
3 |
6 |
ONTOGEN CORPORATION |
0 |
1 |
4 |
1 |
0 |
6 |
OXYGEN8, INC. |
1 |
4 |
0 |
1 |
0 |
6 |
RF DELAWARE, INC. |
2 |
1 |
0 |
2 |
1 |
6 |
SANDEN CORPORATION |
4 |
2 |
0 |
0 |
0 |
6 |
UNITED STATES OF AMERICA, DEPARTMENT OF THE INTERIOR |
1 |
1 |
3 |
0 |
1 |
6 |
WATER RESEARCH COMMISSION |
1 |
4 |
0 |
1 |
0 |
6 |
AKSYS, LTD. |
3 |
1 |
1 |
0 |
0 |
5 |
ALBEMARLE CORPORATION |
1 |
1 |
2 |
0 |
1 |
5 |
AQUA PARTNERS, LTD. |
3 |
2 |
0 |
0 |
0 |
5 |
BIOTAGE, INC. |
0 |
0 |
1 |
2 |
2 |
5 |
BRISTOL-MYERS SQUIBB COMPANY |
3 |
0 |
2 |
0 |
0 |
5 |
COHESIVE TECHNOLOGIES, INC. |
2 |
1 |
0 |
1 |
1 |
5 |
DENSO CORPORATION |
3 |
1 |
1 |
0 |
0 |
5 |
ECOLAB INC. |
1 |
0 |
2 |
2 |
0 |
5 |
EMERSON ELECTRIC CO. |
3 |
0 |
2 |
0 |
0 |
5 |
FRESENIUS AG |
1 |
2 |
1 |
0 |
1 |
5 |
G.B.D. CORP. |
0 |
5 |
0 |
0 |
0 |
5 |
GENENTECH, INC. |
2 |
1 |
1 |
1 |
0 |
5 |
GRT, INC. |
1 |
1 |
2 |
1 |
0 |
5 |
HALLIBURTON ENERGY SERVICES, INC. |
2 |
0 |
0 |
1 |
2 |
5 |
HITCO CARBON COMPOSITES, INC. |
1 |
2 |
2 |
0 |
0 |
5 |
HONDA GIKEN KOGYO KABUSHIKI KAISHA (HONDA MOTOR CO., LTD.) |
1 |
0 |
0 |
3 |
1 |
5 |
ING. WALTER HENGST GMBH & CO. KG |
3 |
0 |
0 |
1 |
1 |
5 |
KRUGER AS |
0 |
5 |
0 |
0 |
0 |
5 |
KUSS CORPORATION |
0 |
1 |
2 |
1 |
1 |
5 |
KVAERNER PULPING AKTIEBOLAG |
0 |
2 |
1 |
1 |
1 |
5 |
LYNNTECH, INC. |
4 |
0 |
1 |
0 |
0 |
5 |
MARINE DESALINATION SYSTEMS, L.L.C. |
0 |
0 |
0 |
1 |
4 |
5 |
MICROBAN PRODUCTS COMPANY |
0 |
3 |
0 |
2 |
0 |
5 |
NEC CORPORATION |
2 |
1 |
1 |
1 |
0 |
5 |
OMEGA CO., LTD. |
1 |
3 |
0 |
1 |
0 |
5 |
OMNIUM DE TRAITEMENTS ET DE VALORISATION (O.T.V.) |
3 |
1 |
0 |
1 |
0 |
5 |
PAQUES BIO SYSTEMS B.V. |
3 |
0 |
1 |
1 |
0 |
5 |
PARKSON CORPORATION |
0 |
1 |
1 |
1 |
2 |
5 |
PENTAPURE INCORPORATED |
1 |
1 |
1 |
2 |
0 |
5 |
PHASE, INC. |
1 |
1 |
0 |
0 |
3 |
5 |
POLARIS POOL SYSTEMS, INC. |
0 |
2 |
1 |
0 |
2 |
5 |
SEH AMERICA, INC. |
0 |
1 |
3 |
1 |
0 |
5 |
SPX CORPORATION |
1 |
0 |
0 |
2 |
2 |
5 |
SUMITOMO HEAVY INDUSTRIES, LTD. |
0 |
1 |
3 |
0 |
1 |
5 |
UNIVERSAL SEPARATORS, INC. |
0 |
2 |
0 |
1 |
2 |
5 |
UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION |
2 |
1 |
0 |
2 |
0 |
5 |
VARCO I/P, INC. |
0 |
0 |
2 |
2 |
1 |
5 |
VORTEX INTERNATIONAL, LLC |
0 |
0 |
2 |
2 |
1 |
5 |
WEATHERFORD/LAMB, INC. |
0 |
0 |
0 |
1 |
4 |
5 |
XEROX CORPORATION |
2 |
0 |
0 |
2 |
1 |
5 |
ZODIAC POOL CARE, INC. |
1 |
3 |
0 |
0 |
1 |
5 |