Originally Posted by
Yerkat
The patent laws usually require that, for an invention to be patentable, it must be:
1) Patentable subject matter, i.e., a kind of subject-matter eligible for patent protection
2) Novel (i.e. at least some aspect of it must be new)
3) Non-obvious (in United States patent law) or involve an inventive step (in European patent law)
4) Useful (in U.S. patent law) or be susceptible of industrial application (in European patent law)
I don't see how is it novel and non-obvious. OK, the latter is very subjective since people tend to think something was obvious to them all along even though they never though of it themselves. I'll give them that. But if something is not novel its harder to argue it isn't obvious.
I wouldn't say any knife edge used in laser projectors creates a single point, rather stacked points that diverge into one over distance.