Doerr & Kusel
Doerr & Leschinger
Doerr & Leschinger, 107 Fifth, plumbers 
1910 Doerr & Kusel succeeded by Doerr & Leschinger
Technology & Engineering, 04 02 1910 issue
The plumbing firm of Doerr & Kusel, Watertown, Wis., which was recently dissolved, has been succeeded by the firm of Doerr & Leschinger. Felix Leschinger has assumed the interest of Walter H. Kusel and the business will be continued under the new name.
1919 Leschinger & Doerr contract for A. Kramp Co.
Technology & Engineering, 12 15 1919 issue
Leschinger & Doerr, one of the most progressive plumbing and heating establishments in Watertown, Wis., are busy plumbing the large new garage and salesrooms being erected by the A. Kramp Co. The new building will have modern offices, sales and display rooms and commodious rest parlors, demanding considerable high-grade plumbing work.
History of Watertown, Wisconsin