Anyone who actually holds some patents knows that what you say is supposed to be true. But what you put in a patent is far more often designed to enumerate the things you want to prevent your competitors from duplicating, while withholding as much 'secret sauce' as possible. Patents are a strategic tool, used in a variety of ways depending on the invention and its market. The reason you don't see this superior technology today is that it's no longer superior. The advance of EVs was effectively stopped because large-format NiMH was withheld from the market. When the EV1 and EV+ were removed from the market, EVs died - there were no other NiMH EVs available. If you don't believe that, show that another maker used them. You can't, because they couldn't. There was certainly plenty of demand for them, shown by the large and very public outrage over the crushing of the EV1s and EV+s retrieved from lease. (See Who Killed the Electric Car.) EVs remained dead until lithium cylindrical cells were strung together by the 1000s to form a pack (along with the elaborate BMS such a pack required), easily outdoing the best performance NiMH could muster. The Chinese were not deeply into EVs at the time. What few they had ran OK on lead acid. Their priorities were elsewhere.