What is "a street view service" other than Google Street View?
Bing has a similar service called Streetside. I can't find any usage of the phrase to mean anything other than Google's service.
Mapillary uses the phrase "street level photos"
It is a registered trademark as well: http://tmsearch.uspto.gov/bin/showfield?f=doc&state=4805:dq9...
I think in a dispute, Google would very likely win.