The Blüthner Patent Action is very different from the modern action, both in the design and touch.
If the action is correctly adjusted, you will, as a pianist, notice that the touch is very light, no "after touch", short hammer travel distance and the key depth is only max 9,5 mm.
Some of these pianos were made to be tuned not higher than 435 Hz at A4.
At the beginning of 1900 Blüthner used both the old and new actions.