I see with Google that you can add rich snippits for SKUs, GTINs (barcode numbers): https://developers.google.com/structured-data/rich-snippets/products
Here's an example of what I'm thinking of adding to our product page:
<span itemprop="gtin12">123456789101</span>
How does Google use this information?
I'm hoping they use it to index your page better and do not show it in the search results, as a 12 digit barcode number would look strange in a search result.