Cassirer mentions in the Claims Resolution Tribunal
The US Claims Resolution Tribunal.

The official information website for the Claims Resolution Tribunal of the Holocaust Victim Assets Litigation against Swiss Banks and other Swiss Entities. The Claims Resolution Tribunal is responsible for processing claims relating to assets deposited in Swiss banks by Victims or Targets of Nazi persecution prior to and during the Second World War.  Its website is at http://www.crt-ii.org

Its 2001 Publication contains the following references:
Cassirer, Alfred [Berlin, Germany] [1]
                Schiffer, Frau Else
                von Simson, Walther
    Cassirer, Bruno [Berlin, Germany] [1]
                Cassirer, Else

The US Claims Resolution Tribunal lists determinations for Ernst Cassirer and Bruno Cassirer
Bruno Cassirer (double click on image for full document)
Ernst Cassirer ((double click on image for full document))
Presidential Advisory Commission on Holocaust Assets in the US  http://www.pcha.gov/research.htm