H1B extension while the existing H1 is still valid

 1. Can one         get an approved H1B extension stamped while the existing H1B petition is still valid (to be expired in another 2 months) ? My current H1 COS petition got approved in Apr 2013 with a validity till Apr 2014. I would like  to know if i can visit India around Feb 2014 with a NEW approved H1B extension and get it stamped, while my current petition is yet to expire ?  FYI -  from now till Feb 2014 i plan to stay on the approved I-797 and not bother to go for stamping.tet     HHHHHHHHlklklksadsadsa