lufthansa [us8216392](http://www.google.com/patents/US8216392) and Gas T. E. [us7445677](http://www.google.com/patents/US7445677) is very close to eachother and I assume there is an infringment. If you search lufthansa cyclean pictures and patent drawing of us7445677 you will see that it is almost same. I know drawing doesnt mean patent but claims are also very similar. So I think that Lufthansa or GTE infringing or there is a licence agreement between them.