June 25th, 1950 I believe! :P
        
                    
             
        
        
        
<span>It is Pythagoras who introduced his famous theorem named pathagorian theorem</span>
        
                    
             
        
        
        
A. Ancient Ones
I just looked it up on google
        
                    
             
        
        
        
<span>This invention was helpful because it helped them save work, time and energy. It also made cotton easier to pick and at the same time it let farmers grow more cotton.</span>