1950s
Miller, W. L.
Webb, Ralph E.
1957
1930s
Hartshorn, Ken
1922
Linchester, Ed
October 1941
1940
1920s
Melton, W.
McLean, O. C.
1940s
March 21 – June 20 1922
1933
Streator, Sidney V.
March 30 1921
1930 – 1949
1970s
August 1921
O. C. Simonds & Co.
June 1964
U.S. Soil Conservation Service
1996
Johnson, Johnson & Roy, Inc.
1943
Watts, May Theilgaard
mid 20th century
March 28 2005
1977
1925 – 1949