Thanks John , that's good to know that they shared ideas in that way .
They were sensitive to other firms copying their designs though. In the book mentioned above they quote a letter from Cappellin ( written in 1954 to Agnoldomenico Pica ) , about his struggle at the beginning , where he says ...." it was the Milan shop ( the Piazzetta ) that had the courage , the daring to show the new production of 'forms and colours ' . There were those then who looked at us , in fact who appreciated us . And this was our ambition : every Saturday to exhibit the production of the week in the windows of the Piazzetta . Such was our joy and our love that we did not notice that indiscreet eyes - allow me to say it - thieves , passed , saw , copied . It was known now that the 'Cappellin-Venini' was successful . Following this the first participation in Monza (1923) with a corner all to ourselves .It was a revelation. "