Knowles Manufacturing Co Inc. 5028 Highway 42 , Manitowoc , 54220 About Solutions products industries Home Companies Knowles Manufacturing Co Inc. Locations Knowles Manufacturing Co Inc. Show or hide locations in map Headquarters Office locations Locations served Distributors Manufacturer Knowles Manufacturing Co Inc. Headquarters 5028 Highway 42 Manitowoc WI 54220 Phone/Fax Number Contact supplier Contact supplier Loading... Drop file here or browse Great, file uploaded. Change File Drop file here or browse Yes, please send to similar suppliers. SEND Cancel and close