Microsoft (MSFT -2.33%) and Johnson & Johnson (JNJ -1.64%) are leading companies in their respective industries. They both have impressive track records and have made their long-term shareholders significantly richer.Some might worry that it's too late to invest in these blue chip companies. Microsoft's market cap is $2.6 trillion, so some detractors feel it has little room to grow. Meanwhile, Johnson & Johnson is still dealing with thousands of talc-related lawsuits, and recently hit another road bump in t ...