body: here i am starting writing blog post and i am totally new,i am using some contents from online power point presentation which don't have any copyright notice on it so is there any copyright infringement issues
  
  
  What it means if the documents not contain © symbol and are posted in public domain have no grounds for violating copyright
  
  
  [![enter image description here](https://i.stack.imgur.com/UWCXP.jpg)](https://i.stack.imgur.com/UWCXP.jpg)
  
  
  
title: Can't get meaning from absence of notice of copyright symbol