~Individually Owned Patent |
91 |
129 |
134 |
117 |
124 |
595 |
PIONEER HI-BRED INTERNATIONAL, INC. |
11 |
47 |
55 |
39 |
57 |
209 |
IOWA STATE UNIVERSITY RESEARCH FOUNDATION INC. |
30 |
51 |
38 |
33 |
24 |
176 |
DEERE + COMPANY |
20 |
29 |
29 |
23 |
59 |
160 |
UNIVERSITY OF IOWA RESEARCH FOUNDATION |
13 |
24 |
28 |
13 |
38 |
116 |
NORAND CORPORATION |
24 |
24 |
26 |
3 |
0 |
77 |
STINE SEED FARM, INC. |
0 |
5 |
14 |
10 |
47 |
76 |
MAYTAG CORPORATION |
13 |
12 |
21 |
16 |
12 |
74 |
ROCKWELL COLLINS, INC. |
0 |
0 |
2 |
22 |
44 |
68 |
ROCKWELL INTERNATIONAL CORPORATION |
12 |
17 |
33 |
3 |
0 |
65 |
INTERMEC IP CORP. |
0 |
0 |
13 |
25 |
13 |
51 |
FISHER CONTROLS INTERNATIONAL, INC. |
6 |
7 |
10 |
16 |
9 |
48 |
GATEWAY 2000, INC. |
1 |
8 |
12 |
11 |
16 |
48 |
SQUARE D COMPANY |
5 |
15 |
13 |
4 |
9 |
46 |
ROCKWELL SCIENCE CENTER, LLC |
1 |
1 |
19 |
8 |
4 |
33 |
TOWNSEND ENGINEERING COMPANY |
2 |
6 |
8 |
7 |
8 |
31 |
HOLDEN'S FOUNDATION SEEDS, INC. |
4 |
7 |
6 |
3 |
9 |
29 |
CEDARAPIDS, INC. |
6 |
4 |
5 |
10 |
2 |
27 |
MCI COMMUNICATIONS CORP. |
3 |
9 |
8 |
2 |
5 |
27 |
CASE CORPORATION |
1 |
2 |
10 |
4 |
7 |
24 |
VERMEER MANUFACTURING COMPANY |
3 |
6 |
3 |
5 |
7 |
24 |
LISLE CORPORATION |
3 |
2 |
3 |
5 |
8 |
21 |
ASGROW SEED COMPANY |
4 |
6 |
2 |
3 |
4 |
19 |
DEKALB GENETICS CORPORATION |
0 |
2 |
8 |
6 |
3 |
19 |
SAUER, INC. |
4 |
2 |
4 |
5 |
3 |
18 |
AMANA COMPANY L.P. |
0 |
2 |
6 |
7 |
2 |
17 |
LITTON SYSTEMS INC. |
1 |
5 |
6 |
3 |
2 |
17 |
MUSCO CORPORATION |
4 |
4 |
4 |
2 |
3 |
17 |
BARNSTEAD THERMOLYNE CORPORATION |
0 |
5 |
4 |
2 |
3 |
14 |
COMPRESSOR CONTROLS CORP. |
4 |
2 |
4 |
1 |
3 |
14 |
RITE-HITE HOLDING CORPORATION |
0 |
0 |
3 |
5 |
5 |
13 |
UNITED STATES OF AMERICA, DEPARTMENT OF AGRICULTURE |
2 |
3 |
3 |
3 |
2 |
13 |
NATIONAL COMPUTER SYSTEMS, INC. |
1 |
5 |
0 |
2 |
4 |
12 |
PELLA CORPORATION |
3 |
1 |
5 |
0 |
3 |
12 |
SAUER-DANFOSS INC. |
0 |
0 |
0 |
0 |
12 |
12 |
HON INDUSTRIES INC. |
3 |
8 |
0 |
0 |
0 |
11 |
KEMIN INDUSTRIES, INC. |
3 |
3 |
0 |
2 |
3 |
11 |
LINKUSA CORPORATION |
5 |
2 |
3 |
1 |
0 |
11 |
E. I. DU PONT DE NEMOURS AND COMPANY |
0 |
2 |
2 |
3 |
3 |
10 |
MIDWEST OILSEEDS, INC. |
0 |
7 |
3 |
0 |
0 |
10 |
AMERICAN HOME PRODUCTS CORPORATION |
1 |
5 |
3 |
0 |
0 |
9 |
BERKLEY, INC. |
0 |
3 |
3 |
3 |
0 |
9 |
GRAIN PROCESSING CORPORATION |
0 |
1 |
2 |
4 |
2 |
9 |
EMCO ENTERPRISES, INC. |
1 |
2 |
1 |
1 |
3 |
8 |
MODERN MUZZLE LOADING, INC. |
4 |
2 |
2 |
0 |
0 |
8 |
MONSANTO CORPORATION |
0 |
0 |
8 |
0 |
0 |
8 |
NONVOLATILE ELECTRONICS, INCORPORATED |
1 |
2 |
3 |
1 |
1 |
8 |
CYCLE COUNTRY ACCESSORIES CORP. |
1 |
2 |
1 |
0 |
3 |
7 |
DETHMERS MANUFACTURING COMPANY, INC. |
0 |
1 |
3 |
2 |
1 |
7 |
GENESIS SYSTEMS GROUP, LTD. |
0 |
1 |
0 |
2 |
4 |
7 |
HACH COMPANY |
3 |
2 |
2 |
0 |
0 |
7 |
IPSCO ENTERPRISES, INC. |
1 |
2 |
3 |
0 |
1 |
7 |
SCHAFER SYSTEMS INC. |
1 |
0 |
2 |
1 |
3 |
7 |
SUKUP MANUFACTURING COMPANY |
2 |
2 |
1 |
1 |
1 |
7 |
AMSC SUBSIDIARY CORPORATION |
0 |
0 |
5 |
1 |
0 |
6 |
ENGINEERED PRODUCTS COMPANY |
0 |
2 |
0 |
0 |
4 |
6 |
GILLETTE CANADA INC. |
1 |
2 |
1 |
1 |
1 |
6 |
GITS MANUFACTURING COMPANY |
0 |
3 |
0 |
2 |
1 |
6 |
HUNTER'S SPECIALTIES, INC. |
0 |
0 |
0 |
3 |
3 |
6 |
HWH CORPORATION |
0 |
1 |
2 |
2 |
1 |
6 |
JAM'N FITNESS CORP. |
1 |
0 |
2 |
1 |
2 |
6 |
KINZE MANUFACTURING, INC. |
3 |
1 |
0 |
1 |
1 |
6 |
LINK MFG., LTD. |
0 |
0 |
2 |
1 |
3 |
6 |
SKYJACK EQUIPMENT INC. |
0 |
2 |
3 |
1 |
0 |
6 |
WATERLOO INDUSTRIES |
0 |
2 |
3 |
1 |
0 |
6 |
WHITE CONSOLIDATED INDUSTRIES, INC. |
0 |
4 |
1 |
0 |
1 |
6 |
ZENCO (NO. 4) LIMITED |
6 |
0 |
0 |
0 |
0 |
6 |
ZENECA LIMITED |
0 |
2 |
1 |
0 |
3 |
6 |
AMERICAN SPORTS INTERNATIONAL, LTD. |
0 |
0 |
2 |
2 |
1 |
5 |
CONEXANT SYSTEMS, INC. |
0 |
0 |
0 |
2 |
3 |
5 |
ETREMA PRODUCTS, INC. |
0 |
0 |
1 |
2 |
2 |
5 |
GARY W. CLEM, INC. |
1 |
0 |
0 |
0 |
4 |
5 |
HUMAN GENE THERAPY RESEARCH INSTITUTE |
0 |
2 |
2 |
0 |
1 |
5 |
INTERMEC TECHNOLOGIES CORPORATION |
0 |
0 |
4 |
1 |
0 |
5 |
KANN MANUFACTURING CORPORATION |
1 |
2 |
1 |
0 |
1 |
5 |
KNESS MANUFACTURING CO., INC. |
0 |
0 |
2 |
1 |
2 |
5 |
NORAND TECHNOLOGY CORPORATION |
1 |
4 |
0 |
0 |
0 |
5 |
PUTCO, INC. |
2 |
1 |
0 |
1 |
1 |
5 |
SEARS MANUFACTURING COMPANY |
1 |
2 |
2 |
0 |
0 |
5 |
SOUTHEASTERN TRADING, LLP |
0 |
0 |
2 |
3 |
0 |
5 |
TRI/MARK CORPORATION |
1 |
0 |
1 |
0 |
3 |
5 |
U.S. MANUFACTURING INC. |
0 |
0 |
0 |
3 |
2 |
5 |
UNIVERSITY OF NORTHERN IOWA FOUNDATION |
1 |
0 |
3 |
1 |
0 |
5 |
WINEGARD COMPANY |
1 |
0 |
1 |
1 |
2 |
5 |