Kya hua toh kya hua - Copyright vs Patent: Kab kis ka application hai?

Maine socha tha copyright aur patent dono hi Intellectual Property ke under aate hain, lekin abhi kuchh samay ke liye padh raha hoon toh ek confusion aayi hai. Copyright protect ideas, kya? Lekin patent bhi ideas protect karti hai, tab bhi jab koi new invention ke bare mein patent lagaata hai. To kya hai difference? Aur kab use karna hai? Mere paas ek example hai - Google se related. Woh logo ke liye copyright hai. Lekin Google ki algorithm ke liye patent hai. To kya woh logo ka patent hai ya copyright? Aur humein kahan use apply karna hai?