Filed on May 18, 2010, for the classes B67B 7/16 and G10K 5/00, the patent was delivered on May 5, 2011, with the number DE102010029044B3 and with mentions of Manuela Schulz as the inventor, and Stephan Ebner as Applicant/Owner.
The patent top description totally ignores the *nose* whistle function:
[EN]The opener (8) has an air supply chamber (10) with an air inlet opening (12) at a rear side of a base body and an air outlet opening (14) at a front side of a rear area, where the opener is made of metal or plastic. An air tearing edge (16) is formed at a side of a passage opening (DU) of a resonance cavity such that different whistler sounds are produced by air flow from the outlet opening during opening of a bottle and/or by a mouth opening that is partially covered by a lower side of the base body, where the side is arranged opposite to the outlet opening.However, nose whistling is shown in Fig. 9A (you need to turn your head to the left to see it in the good position). Here are the most interesting illustrations in the patent:
Nasenpfeife trademark and Bernd Kaltenbach: