British Telecom has filed a lawsuit against Google in a Delaware court alleging that some of Google’s services infringe on six of its patents.

BT claims that the search engine company’s services such as Android Market, Google Search, Google Maps, Google+ and Google Offers violate patents owned by it.

If the verdict goes against Google, then Google or mobile handset makers will have to pay royalties to BT on each Android handset in use and produce by them.

A Google representative denying BT’s rejected allegations said the company believed these claims are without merit, and they would defend vigorously against them.

IP analyst Florian Mueller, writing in a Foss Patents blog, said that with so many major patent holders asserting their rights, obligations to pay royalties may force Google to change its Android licensing model and pass royalties on to device makers.

Meanwhile, Google is embroiled in quite a few lawsuits relating to Android.