In case you were wondering (and I know you were) what a Dutch patent from 1960 looks like, I have scanned one and embedded it in this post. This particular item is of particular significance to me, since it lists my grandfather as one of the inventors (Hendrik van Kranen). It is written in Dutch so if your mastery of the Dutch composition is not up to scratch, then you will probably not enjoy reading it as much as I have. However, I may attempt a translation at some point and when I do, I will of course share it here.
This is what a Dutch patent from 1960 looks like
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