In 1888, he founded an antiquarian bookshop with his brother, Albert, selling theological, archaeological and art literary works.
From 1920 the company's headquarters were at Rotenturmstrasse 14, where it expanded its range to include furniture, carpets, jewelry, gold and silver goods.
His widow, Melanie (née Horner; born 1872/1873 – died after 1945) and their son, Herbert Alexander Kende (1908-1977), continued to run the auction house.
The proceedings initiated against him for "preparation for high treason" and "benefiting the enemy" had been temporarily suspended in 1944 due to his inability to stand trial.
Mother and son founded a successful art dealership in New York ("Kende Galleries"), which they continued to run there after the war.
At the request of his surviving sister, Irma Zeller von Zellhain, he was declared deceased by order of the regional court for civil law matters in Vienna on 10 November 1946.
His brother, antiquarian book dealer and publisher Josef Kende (born 6 June 1868), was deported to Dachau concentration camp on 1 April 1938 and later was sent to Buchenwald.