50 Most Innovative Companies 2012

I took at look at Fast Company’s list of the 50 most innovative companies of 2012 today.  I’ve heard of 23 of them, less than half.  I know I’m not a technology guru, but I am in a technical field and would like to think I’m more informed than average, but this did not reassure me.  So I thought I’d throw it out there.  How many of these companies have you heard of?