~Individually Owned Patent |
258 |
279 |
271 |
309 |
245 |
1362 |
BAXTER INTERNATIONAL INC. |
18 |
10 |
12 |
13 |
10 |
63 |
PALL CORPORATION |
14 |
12 |
9 |
9 |
9 |
53 |
NALCO CHEMICAL COMPANY |
11 |
7 |
14 |
13 |
4 |
49 |
U.S. FILTER CORPORATION |
6 |
5 |
11 |
6 |
13 |
41 |
INSTITUT FRANCAIS DU PETROLE |
3 |
3 |
13 |
7 |
6 |
32 |
BAKER HUGHES INCORPORATED |
6 |
10 |
9 |
5 |
0 |
30 |
DANA CORPORATION |
6 |
3 |
6 |
8 |
5 |
28 |
TRANSGENOMIC INCORPORATED |
1 |
2 |
8 |
4 |
11 |
26 |
SAMSUNG ELECTRONICS CO., LTD. |
17 |
6 |
1 |
1 |
0 |
25 |
UNIVERSITY OF CALIFORNIA, THE REGENTS OF |
3 |
8 |
8 |
0 |
6 |
25 |
ZENON ENVIRONMENTAL INC. |
2 |
5 |
4 |
8 |
6 |
25 |
BETZDEARBORN INC. |
10 |
4 |
7 |
2 |
0 |
23 |
PARKER-HANNIFIN CORPORATION |
4 |
3 |
7 |
7 |
2 |
23 |
UOP |
6 |
4 |
4 |
3 |
5 |
22 |
KURITA WATER INDUSTRIES LTD. |
3 |
5 |
6 |
2 |
4 |
20 |
MILLIPORE CORPORATION |
4 |
7 |
4 |
3 |
2 |
20 |
SHARP KABUSHIKI KAISHA (SHARP CORPORATION) |
5 |
2 |
2 |
5 |
5 |
19 |
EASTMAN KODAK COMPANY |
4 |
5 |
4 |
3 |
2 |
18 |
FLEETGUARD, INC. |
4 |
4 |
2 |
5 |
2 |
17 |
AKSYS, LTD. |
7 |
4 |
3 |
1 |
1 |
16 |
CUNO INC. |
1 |
4 |
4 |
4 |
3 |
16 |
CYTEC TECHNOLOGY CORP. |
11 |
3 |
1 |
1 |
0 |
16 |
HEMASURE, INC. |
4 |
3 |
5 |
3 |
1 |
16 |
HITACHI, LTD |
1 |
5 |
6 |
3 |
1 |
16 |
ORGANO CORPORATION |
4 |
1 |
1 |
4 |
6 |
16 |
USF FILTRATION AND SEPARATIONS GROUP INC. |
0 |
4 |
7 |
5 |
0 |
16 |
DONALDSON COMPANY, INC. |
2 |
2 |
5 |
5 |
1 |
15 |
BAYER AKTIENGESELLSCHAFT |
2 |
2 |
3 |
1 |
6 |
14 |
DAICEL CHEMICAL INDUSTRIES LTD. |
3 |
1 |
3 |
4 |
3 |
14 |
DEGREMONT S.A. |
0 |
0 |
6 |
6 |
2 |
14 |
FUJI PHOTO FILM CO., LTD |
2 |
3 |
2 |
4 |
3 |
14 |
TORAY INDUSTRIES INC. |
1 |
3 |
1 |
4 |
5 |
14 |
BRISTOL-MYERS SQUIBB COMPANY |
5 |
3 |
3 |
0 |
2 |
13 |
DYAX CORP. |
0 |
1 |
7 |
3 |
2 |
13 |
FILTERWERK MANN + HUMMEL GMBH |
3 |
2 |
2 |
3 |
3 |
13 |
NITTO DENKO CORPORATION |
1 |
2 |
2 |
3 |
5 |
13 |
OMNIUM DE TRAITEMENTS ET DE VALORISATION (O.T.V.) |
4 |
5 |
3 |
1 |
0 |
13 |
SARTORIUS AG |
0 |
1 |
2 |
6 |
4 |
13 |
ASAHI KASEI KOGYO KABUSHIKI KAISHA |
0 |
2 |
4 |
3 |
3 |
12 |
BASF AKTIENGESELLSCHAFT |
4 |
1 |
3 |
4 |
0 |
12 |
GENERAL ELECTRIC COMPANY |
3 |
1 |
0 |
4 |
4 |
12 |
ISCO, INC. |
1 |
2 |
4 |
5 |
0 |
12 |
AMERSHAM PHARMACIA BIOTECH AB |
1 |
1 |
2 |
4 |
3 |
11 |
COBE LABORATORIES, INC. |
5 |
3 |
3 |
0 |
0 |
11 |
GAMBRO AB |
2 |
3 |
3 |
1 |
2 |
11 |
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE |
0 |
1 |
2 |
7 |
1 |
11 |
WATERS INVESTMENTS LIMITED |
0 |
2 |
2 |
3 |
4 |
11 |
AKZO NOBEL NV |
2 |
4 |
1 |
2 |
1 |
10 |
ALLIED-SIGNAL INC. |
2 |
0 |
3 |
3 |
2 |
10 |
BALDWIN FILTERS, INC. |
3 |
3 |
0 |
2 |
2 |
10 |
CATERPILLAR INC. |
4 |
1 |
4 |
0 |
1 |
10 |
CORNING INCORPORATED |
1 |
0 |
3 |
4 |
2 |
10 |
FANTOM TECHNOLOGIES INC. |
0 |
0 |
1 |
6 |
3 |
10 |
FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH |
0 |
0 |
5 |
2 |
3 |
10 |
HOSPAL INDUSTRIES (S.A.) |
2 |
1 |
3 |
3 |
1 |
10 |
KIMBERLY-CLARK WORLDWIDE, INC. |
1 |
3 |
0 |
3 |
3 |
10 |
ARCHIMEDES TECHNOLOGY GROUP, INC. |
0 |
0 |
1 |
8 |
0 |
9 |
BIO-RAD LABORATORIES, INC. |
2 |
5 |
1 |
1 |
0 |
9 |
DELTA ENVIRONMENTAL PRODUCTS, INC. |
3 |
3 |
1 |
2 |
0 |
9 |
DOW CHEMICAL COMPANY |
1 |
1 |
1 |
3 |
3 |
9 |
EXXON RESEARCH + ENGINEERING CO. |
2 |
3 |
2 |
2 |
0 |
9 |
FRESENIUS AG |
3 |
2 |
1 |
2 |
1 |
9 |
MITSUBISHI RAYON CO., LTD. |
1 |
1 |
0 |
5 |
2 |
9 |
NELSON INDUSTRIES, INC. |
1 |
2 |
1 |
2 |
3 |
9 |
STANADYNE AUTOMOTIVE CORP. |
2 |
4 |
2 |
1 |
0 |
9 |
SYMYX TECHNOLOGIES, INC. |
0 |
0 |
0 |
1 |
8 |
9 |
BATTELLE MEMORIAL INSTITUTE |
1 |
2 |
2 |
1 |
2 |
8 |
BUCHER-GUYER AG MASCHINENFABRIK |
1 |
1 |
2 |
2 |
2 |
8 |
COMMISSARIAT A L'ENERGIE ATOMIQUE |
0 |
3 |
1 |
2 |
2 |
8 |
DERRICK MANUFACTURING CORPORATION |
2 |
4 |
1 |
0 |
1 |
8 |
DIONEX CORPORATION |
2 |
3 |
2 |
1 |
0 |
8 |
E. I. DU PONT DE NEMOURS AND COMPANY |
1 |
1 |
1 |
4 |
1 |
8 |
EBARA CORPORATION |
1 |
2 |
3 |
0 |
2 |
8 |
H-TECH, INC. |
0 |
4 |
1 |
3 |
0 |
8 |
KUSS CORPORATION |
3 |
2 |
0 |
1 |
2 |
8 |
LUCAS INDUSTRIES PUBLIC LTD. COMPANY |
1 |
6 |
0 |
1 |
0 |
8 |
NEC CORPORATION |
3 |
1 |
2 |
1 |
1 |
8 |
SHELL OIL COMPANY |
2 |
2 |
1 |
1 |
2 |
8 |
SHINKO PANTEC COMPANY, LIMITED |
0 |
0 |
4 |
2 |
2 |
8 |
TEXACO INC. |
2 |
2 |
4 |
0 |
0 |
8 |
UNITED STATES OF AMERICA, DEPARTMENT OF THE INTERIOR |
0 |
3 |
1 |
1 |
3 |
8 |
UNITED STATES OF AMERICA, NAVY |
2 |
2 |
0 |
4 |
0 |
8 |
AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY |
5 |
0 |
2 |
0 |
0 |
7 |
AMCOL INTERNATIONAL CORPORATION |
0 |
2 |
0 |
1 |
4 |
7 |
AQUA-AEROBIC SYSTEMS INC. |
0 |
3 |
3 |
1 |
0 |
7 |
BASF CORP. |
3 |
1 |
1 |
0 |
2 |
7 |
CALGON CORPORATION |
4 |
1 |
1 |
1 |
0 |
7 |
COCA-COLA COMPANY |
1 |
1 |
0 |
2 |
3 |
7 |
COHESIVE TECHNOLOGIES, INC. |
2 |
2 |
2 |
1 |
0 |
7 |
DENSO CORPORATION |
0 |
2 |
3 |
1 |
1 |
7 |
EMERSON ELECTRIC CO. |
1 |
1 |
3 |
0 |
2 |
7 |
ENVIROQUIP, INC. |
2 |
1 |
2 |
1 |
1 |
7 |
FOUNTAINHEAD TECHNOLOGIES, INC. |
4 |
2 |
1 |
0 |
0 |
7 |
IDAHO RESEARCH FOUNDATION, INC. |
4 |
1 |
0 |
1 |
1 |
7 |
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, TAIWAN |
0 |
0 |
2 |
3 |
2 |
7 |
ING. WALTER HENGST GMBH & CO. KG |
3 |
1 |
3 |
0 |
0 |
7 |
SANDEN CORPORATION |
0 |
1 |
4 |
2 |
0 |
7 |
WATER RESEARCH COMMISSION |
0 |
2 |
1 |
4 |
0 |
7 |
ABTECH INDUSTRIES, INC. |
0 |
1 |
4 |
1 |
0 |
6 |
AGILENT TECHNOLOGIES, INC. |
0 |
0 |
1 |
3 |
2 |
6 |
ARCH DEVELOPMENT CORP. |
1 |
4 |
0 |
0 |
1 |
6 |
ASAHI MEDICAL CO., LTD. |
0 |
0 |
2 |
1 |
3 |
6 |
CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED |
0 |
0 |
3 |
1 |
2 |
6 |
EASTMAN CHEMICAL CO., LTD. |
1 |
4 |
1 |
0 |
0 |
6 |
HEWLETT-PACKARD COMPANY |
2 |
4 |
0 |
0 |
0 |
6 |
IMMUNIVEST CORPORATION |
1 |
3 |
2 |
0 |
0 |
6 |
INNOVA/PURE WATER INC. |
0 |
0 |
3 |
3 |
0 |
6 |
KINETICO, INC. |
1 |
0 |
2 |
1 |
2 |
6 |
KRUGER AS |
0 |
1 |
0 |
5 |
0 |
6 |
LYNNTECH, INC. |
1 |
0 |
4 |
0 |
1 |
6 |
MEDISYSTEMS TECHNOLOGY CORPORATION |
1 |
2 |
3 |
0 |
0 |
6 |
MEDTRONIC INC. |
2 |
3 |
1 |
0 |
0 |
6 |
OXYGEN8, INC. |
0 |
1 |
1 |
4 |
0 |
6 |
PHARMACIA BIOTECH AB |
5 |
0 |
0 |
1 |
0 |
6 |
RECOVERY ENGINEERING, INC. |
2 |
2 |
1 |
1 |
0 |
6 |
SANDIA CORPORATION |
1 |
0 |
3 |
0 |
2 |
6 |
SANYO ELECTRIC CO., LTD. |
0 |
0 |
2 |
0 |
4 |
6 |
SHIMADZU CORPORATION |
0 |
0 |
3 |
2 |
1 |
6 |
TETRA TECHNOLOGIES, INC. |
1 |
2 |
2 |
0 |
1 |
6 |
WHATMAN INC. |
1 |
1 |
4 |
0 |
0 |
6 |
ZOELLER COMPANY |
1 |
2 |
1 |
1 |
1 |
6 |
ANDRITZ-PATENTVERWALTUNGS-GESELLSCHAFT M.B.H. |
2 |
1 |
1 |
1 |
0 |
5 |
AQUA PARTNERS, LTD. |
0 |
0 |
3 |
2 |
0 |
5 |
BECTON, DICKINSON AND COMPANY |
2 |
1 |
0 |
0 |
2 |
5 |
BRITISH NUCLEAR FUELS PLC |
3 |
0 |
0 |
2 |
0 |
5 |
CLEARLINE SYSTEMS, INC. |
0 |
0 |
1 |
3 |
1 |
5 |
DELAWARE CAPITAL FORMATION, INC. |
2 |
1 |
0 |
1 |
1 |
5 |
DIALYSIS SYSTEMS, INC. |
0 |
0 |
0 |
5 |
0 |
5 |
G.B.D. CORP. |
0 |
0 |
0 |
5 |
0 |
5 |
HENKEL CORPORATION |
3 |
2 |
0 |
0 |
0 |
5 |
HITACHI PLANT ENGINEERING & CONSTRUCTION CO., LTD. |
1 |
3 |
1 |
0 |
0 |
5 |
HITCO CARBON COMPOSITES, INC. |
0 |
0 |
1 |
2 |
2 |
5 |
IMPERIAL CHEMICAL INDUSTRIES PLC |
3 |
1 |
0 |
1 |
0 |
5 |
KEMIRA KEMI AKTIEBOLAG |
1 |
2 |
1 |
1 |
0 |
5 |
KIONIX, INC. |
0 |
0 |
0 |
1 |
4 |
5 |
MICROBAR INCORPORATED |
0 |
3 |
0 |
1 |
1 |
5 |
MILLIPORE INVESTMENT HOLDINGS LIMITED |
3 |
0 |
1 |
1 |
0 |
5 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
2 |
3 |
0 |
0 |
0 |
5 |
MINNTECH CORPORATION |
3 |
0 |
0 |
2 |
0 |
5 |
NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO |
0 |
2 |
1 |
0 |
2 |
5 |
NIPPON SHOKUBAI CO., LTD. |
1 |
2 |
0 |
0 |
2 |
5 |
NIPPONDENSO CO., LTD. |
2 |
3 |
0 |
0 |
0 |
5 |
ONTOGEN CORPORATION |
0 |
0 |
0 |
1 |
4 |
5 |
PLYMOUTH PRODUCTS INCORPORATED |
0 |
3 |
1 |
0 |
1 |
5 |
RHONE-POULENC CHIMIE |
3 |
2 |
0 |
0 |
0 |
5 |
ROHM AND HAAS COMPANY |
2 |
1 |
1 |
0 |
1 |
5 |
SIEMENS AKTIENGESELLSCHAFT |
0 |
3 |
1 |
0 |
1 |
5 |
STANADYNE CORPORATION |
0 |
0 |
0 |
0 |
5 |
5 |
UNION OIL COMPANY OF CALIFORNIA |
1 |
2 |
2 |
0 |
0 |
5 |
UNIVERSITY OF WASHINGTON |
0 |
3 |
1 |
0 |
1 |
5 |
UNIVERSITY OF WATERLOO |
0 |
2 |
0 |
3 |
0 |
5 |
WASTECH INTERNATIONAL, INC. |
3 |
0 |
2 |
0 |
0 |
5 |
|
0 |
1 |
0 |
2 |
2 |
5 |