Legal documentation regarding the change of commercial ownership of the Max Blaskopf Company in Vienna, 1939 Documentation from the Amtsgericht (local district court) confirming the authenticity of the information provided for the registration of the business in the Handelsregister (trade register) regarding the change of ownership of a commercial company in the name of Max Blaskopf. According to the nature of the contents of the document, what is being discussed is Aryanization.