~Individually Owned Patent |
129 |
134 |
117 |
124 |
84 |
588 |
PIONEER HI-BRED INTERNATIONAL, INC. |
47 |
55 |
39 |
57 |
41 |
239 |
DEERE + COMPANY |
29 |
29 |
23 |
59 |
52 |
192 |
IOWA STATE UNIVERSITY RESEARCH FOUNDATION INC. |
51 |
38 |
33 |
24 |
17 |
163 |
ROCKWELL COLLINS, INC. |
0 |
2 |
22 |
44 |
63 |
131 |
UNIVERSITY OF IOWA RESEARCH FOUNDATION |
24 |
28 |
13 |
38 |
21 |
124 |
STINE SEED FARM, INC. |
5 |
14 |
10 |
47 |
6 |
82 |
MAYTAG CORPORATION |
12 |
21 |
16 |
12 |
17 |
78 |
GATEWAY 2000, INC. |
8 |
12 |
11 |
16 |
27 |
74 |
INTERMEC IP CORP. |
0 |
13 |
25 |
13 |
5 |
56 |
NORAND CORPORATION |
24 |
26 |
3 |
0 |
0 |
53 |
ROCKWELL INTERNATIONAL CORPORATION |
17 |
33 |
3 |
0 |
0 |
53 |
FISHER CONTROLS INTERNATIONAL, INC. |
7 |
10 |
16 |
9 |
8 |
50 |
SQUARE D COMPANY |
15 |
13 |
4 |
9 |
8 |
49 |
VERMEER MANUFACTURING COMPANY, INC. |
6 |
3 |
5 |
7 |
18 |
39 |
ROCKWELL SCIENCE CENTER, LLC |
1 |
19 |
8 |
4 |
0 |
32 |
TOWNSEND ENGINEERING COMPANY |
6 |
8 |
7 |
8 |
3 |
32 |
CASE CORPORATION |
2 |
10 |
4 |
7 |
7 |
30 |
MCI COMMUNICATIONS CORP. |
9 |
8 |
2 |
5 |
4 |
28 |
LISLE CORPORATION |
2 |
3 |
5 |
8 |
9 |
27 |
HOLDEN'S FOUNDATION SEEDS, INC. |
7 |
6 |
3 |
9 |
1 |
26 |
CEDARAPIDS, INC. |
4 |
5 |
10 |
2 |
2 |
23 |
ASGROW SEED CO. LLC |
6 |
2 |
3 |
4 |
6 |
21 |
SAUER-DANFOSS INC. |
0 |
0 |
0 |
12 |
9 |
21 |
DEKALB GENETICS CORPORATION |
2 |
8 |
6 |
3 |
1 |
20 |
LITTON SYSTEMS INC. |
5 |
6 |
3 |
2 |
4 |
20 |
BARNSTEAD THERMOLYNE CORPORATION |
5 |
4 |
2 |
3 |
4 |
18 |
GRAIN PROCESSING CORPORATION |
1 |
2 |
4 |
2 |
9 |
18 |
AMANA COMPANY L.P. |
2 |
6 |
7 |
2 |
0 |
17 |
MUSCO CORPORATION |
4 |
4 |
2 |
3 |
4 |
17 |
RITE-HITE HOLDING CORPORATION |
0 |
3 |
5 |
5 |
4 |
17 |
SAUER, INC. |
2 |
4 |
5 |
3 |
0 |
14 |
UNITED STATES OF AMERICA, DEPARTMENT OF AGRICULTURE |
3 |
3 |
3 |
2 |
1 |
12 |
COMPRESSOR CONTROLS CORP. |
2 |
4 |
1 |
3 |
1 |
11 |
GENESIS SYSTEMS GROUP, LTD. |
1 |
0 |
2 |
4 |
4 |
11 |
NATIONAL COMPUTER SYSTEMS, INC. |
5 |
0 |
2 |
4 |
0 |
11 |
E. I. DU PONT DE NEMOURS AND COMPANY |
2 |
2 |
3 |
3 |
0 |
10 |
KEMIN INDUSTRIES, INC. |
3 |
0 |
2 |
3 |
2 |
10 |
MIDWEST OILSEEDS, INC. |
7 |
3 |
0 |
0 |
0 |
10 |
U.S. MANUFACTURING INC. |
0 |
0 |
3 |
2 |
5 |
10 |
BERKLEY, INC. |
3 |
3 |
3 |
0 |
0 |
9 |
PELLA CORPORATION |
1 |
5 |
0 |
3 |
0 |
9 |
AMERICAN HOME PRODUCTS CORPORATION |
5 |
3 |
0 |
0 |
0 |
8 |
AMERICAN SPORTS INTERNATIONAL, LTD. |
0 |
2 |
2 |
1 |
3 |
8 |
CRYSTAL GROUP INC |
0 |
0 |
0 |
3 |
5 |
8 |
HON INDUSTRIES INC. |
8 |
0 |
0 |
0 |
0 |
8 |
IPSCO ENTERPRISES, INC. |
2 |
3 |
0 |
1 |
2 |
8 |
JAM'N FITNESS CORP. |
0 |
2 |
1 |
2 |
3 |
8 |
MCI WORLDCOM, INC. |
0 |
1 |
2 |
1 |
4 |
8 |
MONSANTO CORPORATION |
0 |
8 |
0 |
0 |
0 |
8 |
WATERLOO INDUSTRIES |
2 |
3 |
1 |
0 |
2 |
8 |
CYCLE COUNTRY ACCESSORIES CORP. |
2 |
1 |
0 |
3 |
1 |
7 |
DETHMERS MANUFACTURING COMPANY, INC. |
1 |
3 |
2 |
1 |
0 |
7 |
EMCO ENTERPRISES, INC. |
2 |
1 |
1 |
3 |
0 |
7 |
HWH CORPORATION |
1 |
2 |
2 |
1 |
1 |
7 |
NONVOLATILE ELECTRONICS, INCORPORATED |
2 |
3 |
1 |
1 |
0 |
7 |
TRI/MARK CORPORATION |
0 |
1 |
0 |
3 |
3 |
7 |
AMSC SUBSIDIARY CORPORATION |
0 |
5 |
1 |
0 |
0 |
6 |
CONEXANT SYSTEMS, INC. |
0 |
0 |
2 |
3 |
1 |
6 |
ENGINEERED PRODUCTS COMPANY |
2 |
0 |
0 |
4 |
0 |
6 |
GITS MANUFACTURING COMPANY |
3 |
0 |
2 |
1 |
0 |
6 |
HUMAN GENE THERAPY RESEARCH INSTITUTE |
2 |
2 |
0 |
1 |
1 |
6 |
HUNTER'S SPECIALTIES, INC. |
0 |
0 |
3 |
3 |
0 |
6 |
LINK MFG., LTD. |
0 |
2 |
1 |
3 |
0 |
6 |
LINKUSA CORPORATION |
2 |
3 |
1 |
0 |
0 |
6 |
SCHAFER SYSTEMS INC. |
0 |
2 |
1 |
3 |
0 |
6 |
SKYJACK EQUIPMENT INC. |
2 |
3 |
1 |
0 |
0 |
6 |
SUKUP MANUFACTURING COMPANY |
2 |
1 |
1 |
1 |
1 |
6 |
WHITE CONSOLIDATED INDUSTRIES, INC. |
4 |
1 |
0 |
1 |
0 |
6 |
ZENECA LIMITED |
2 |
1 |
0 |
3 |
0 |
6 |
ALCOA INC. |
0 |
0 |
0 |
2 |
3 |
5 |
CIVCO MEDICAL INSTRUMENTS INC. |
0 |
1 |
0 |
2 |
2 |
5 |
EBSCO INDUSTRIES, INC. |
0 |
0 |
0 |
3 |
2 |
5 |
ETREMA PRODUCTS, INC. |
0 |
1 |
2 |
2 |
0 |
5 |
GARY W. CLEM, INC. |
0 |
0 |
0 |
4 |
1 |
5 |
GILLETTE CANADA INC. |
2 |
1 |
1 |
1 |
0 |
5 |
INTERMEC TECHNOLOGIES CORPORATION |
0 |
4 |
1 |
0 |
0 |
5 |
KNESS MANUFACTURING CO., INC. |
0 |
2 |
1 |
2 |
0 |
5 |
PUTCO, INC. |
1 |
0 |
1 |
1 |
2 |
5 |
SOUTHEASTERN TRADING, LLP |
0 |
2 |
3 |
0 |
0 |
5 |
THERMAL DYNAMICS, INC. |
0 |
1 |
0 |
1 |
3 |
5 |
UROSURGE, INC. |
3 |
1 |
0 |
0 |
1 |
5 |
WAVERLY LIGHT AND POWER |
0 |
1 |
1 |
2 |
1 |
5 |
WESTINGHOUSE AIR BRAKE COMPANY |
0 |
4 |
0 |
0 |
1 |
5 |
WORLDCOM, INC. |
0 |
0 |
0 |
0 |
5 |
5 |