not sure I get a lawsuit. the nss and surfgate seem to result in a similar movement of the boat but are completely different from each other in how it achieves the intended results both in design and function.
It is interesting that both manufacturers have systems that hit the market at roughly the same time. both appear to have spent $$ and time in r&d. one would assume that the design and testing is kept under wraps and neither system looks to have been "rushed" to the market so could it be more a case of 2 manuf. creating similar ideas at a similar time?