Hi, Here the patent if this is what you are looking for:
Somewhere here on the board, I think it was already an elder posting, a polish member was looking for 2 old german handgrenade patents Krüeger and Knecht from 1926. I found 1 patent taken out by a Johannes krueger in 1922. May be this is the one the person is looking for. It has the No. DE347180
Could somebody please post a workable link to the patent.
So, I looks for. I be please very that someone remembered, it will add me surely