The International Trade Commission (ITC) confirmed an initial ruling that found various Motorola Mobility smartphones infringed on nine Microsoft patents related to scheduling.

The ruling, which relates to an investigation that began in November of 2010, will result in the banning of certain Motorola devices, such as the Motorola Razr and Droid 4, from entering the United States.

David Howard, corporate vice president and deputy general counsel for Microsoft, said in a statement that the decision to sue Motorola in the ITC was made only after Motorola chose to refuse Microsoft’s efforts to renew a patent license for well over a year.

“We’re pleased the full Commission agreed that Motorola has infringed Microsoft’s intellectual property, and we hope that now Motorola will be willing to join the vast majority of Android device makers selling phones in the US by taking a license to our patents,” Howard wrote.

Motorola said in a statement that it was “disappointed by the Commission’s ruling” and that it would be reviewing the ruling in the coming days, but contends that it only violated one patent.

“Motorola Mobility will not experience any impact in the near term, as the Commission’s ruling is subject to a $0.33/per unit bond during the 60 day Presidential review period,” the company wrote, adding that it would explore all options, including appeal.