Do I need stamping for re-entry ?

My H1b is valid till 30 Sep 2015, and my passport is valid till 2019. The visa is multiple entry. I first entered US on 1st Jan 2013.

I came to India due to a family emergency on 10th Nov 2014. My return ticket is for 24th Nov. Can I travel with the same visa OR Do I need to go for stamping ? Also, what should I be carrying when travelling ?