[mtgx]

That seems like a difference without a distinction to me.

You slide to unlock to open a door. You slide to unlock to open your phone (or rather the "door" blocking you from accessing the content in the phone). Seems quite similar to me.

[axman6]

In hindsight, yes, but the fact a solution is simple does not mean that it isn't inventive. There is the possibility of invention in the use of technology from one field in another unrelated field.