For those who want to research this further (including full claim text, history, who examined it, images of the submitted documents, etc):

1.) Navigate to http://portal.uspto.gov/pair/PublicPair

2.) Enter the CAPTCHA if prompted

3.) In the "Search for Application" form, select the radio button for 'patent number'

4.) Type '9,386,790', without quotes, into the 'Enter Number' text box.

5.) Click on the SEARCH button.

This will take you to the patent page with each of the tabs having different information about the patent. If you get a notification that the system is busy, just wait a few seconds and try again.

These same steps with different patent and application numbers can be used in the future if you run into other US patent related inquiries.