Microsoft Corp won a critical ITC ruling which says  Motorola Mobility Holdings Inc's Android phones violate one of its smartphone patents, while failing to convince a judge that six others are being infringed as well. 

Motorola Mobility violated a patent for generating meeting requests and group scheduling, US International Trade Commission Judge Theodore Essex said in a notice today.

The finding is the second in two days from the ITC that has determined that some features of phones running Google's Android operating system are using licensed technology without permission. 

"As Samsung, HTC, Acer and other companies have recognized, respecting others' intellectual property through licensing is the right path forward," a Bloomberg report quoted David Howard, deputy general counsel for Redmond, Washington-based Microsoft as saying .