[1] He published works by his contemporaries, such as Johannes Brahms and Edvard Grieg, who was his friend and had a room on the upper floor of the building which housed both the business and the family.

He was the first to add works by Gustav Mahler, Hans Pfitzner, Max Reger, Arnold Schönberg and Hugo Wolf to the house's products, and in 1932, he acquired the rights to seven early tone poems by Richard Strauss.

[1] In 1911, Hinrichsen was a patron of the Hochschule für Frauen zu Leipzig [de], the first academy for women in Germany,[2] founded by Henriette Goldschmidt (1825–1920), whose work he supported.

[4] In 1926, he donated 200,000 Reichsmarks to the University of Leipzig to enable it to acquire a collection of musical instruments (Musikinstrumenten-Sammlung Wilhelm Heyer) from Cologne.

On January 11, 1940, he was forced to relinquish to Hitler's art dealer Hildebrand Gurlitt his Pissarro painting, Sower And Ploughman, however he still did not receive a visa.

[11] In 2013, drawing that had belonged to Hinrichsen, "Klavierspiel" (Playing the Piano) by Carl Spitzweg, was discovered in the stash of artworks hoarded by the son of Hitler's art dealer Hildebrand Gurlitt in Munich in 2013.

[12] It was restituted to Hinrichsen's heirs by the Museum of Fine Arts in Bern, that had received part of the Gurlitt collection after his death.