As late as 16 March 1903, Frau Emilie Schafer, of 26 Rigaerstrasse, Berlin, applied for a patent (Sch. 16096: Gebrauchmuster 30. d. 204538) for a "Verschliessbares Schutznetz fur Frauen gegen echeliche Untreue" (Girdle with lock and key as a protection against conjugal infidelity). Writing in about 1930 Dingwall noted that enquiries about the availability of chastity belts were still being made of surgical instrument makers in London - "and doubtless such sometimes supplied."