I have no expertise in fuel cell technology to judge the value of the patents. Overall I would think cranking out patents on a fairly regular basis is a good indication they are improving the technology at a rapid pace.
But I think their biggest hurdle is convincing the environmental community zealots that NatGas is NOT the enemy...which may prove to be a bridge too far for proponents of this type of technology. I personally have no problem with natgas as the fuel. I think the +'s outweigh the -'s.
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