| 1 | Rupert Linn & Son | Pilot Mound, IA | | Nov 16 1967 |
| 2 | Rupert M. or Dollie A. Linn | Pilot Mound, IA | Mar 05 1973 | Jan 01 2000 |
| 3 | Herman, Jr. or Pauline Bleich | Dakota City, IA | Dec 11 1973 | Jan 01 2000 |
| 4 | Charles McDonough | Osceola, IA | Nov 01 1979 | Jan 01 2000 |
| 5 | Dennis & Marjorie Speicher | Berthoud, CO | Mar 11 1981 | Jan 01 2000 |
| 6 | Cheryl or Philip K. Wessel | Burlingame, KS | Apr 03 1982 | Jan 01 2000 |
| 7 | Howard Johnstone | Holton, KS | Oct 22 1983 | Jan 01 2000 |
| 8 | A. A. Burgdorfer | Richmond, KS | Apr 14 1984 | Jan 01 2000 |
| 9 | David Backer | Fulton, MO | Apr 10 1987 | Jan 01 2000 |
