And Philips tried to use trademark law after their patent on triple-headed rotary shavers expired, and they failed: https://www.theguardian.com/media/2002/jun/1

And Philips tried to use trademark law after their patent on triple-headed rotary shavers expired, and they failed: https://www.theguardian.com/media/2002/jun/19/marketingandpr.uknews https://www.theguardian.com/media/2002/jun/19/marketingandpr...