All of Google’s marketing power hasn’t yet helped Motorola stop its slide in the American smartphone market. The latest numbers from comScore show that Motorola’s share of the smartphone market in the United States continued to fall over the summer despite the high-profile launches of its Moto X flagship phone as well as its Droid Ultra, Droid Maxx and Droid Mini smartphones on Verizon. In all, Motorola’s share of the U.S. market shrank from 7.2% for the three-month period ending in June 2013 to 6.8% for the three-month period ending in September 2013. Motorola’s loss over the summer was Apple and Samsung’s gain, however, as both smartphone titans teamed to produce a combined market share of more than 65%.