They remain in production , and are sold under license through the Tiffen corporation .
Mees sold their company to Eastman Kodak in 1912 , and Kodak started manufacturing Wratten filters .
Eastman Kodak remain in production , and are sold under license through the Tiffen corporation .
Mees sold their company to Eastman Kodak in 1912 , and Kodak started manufacturing Wratten filters .