The firsts of everything? All North stuff
There was a brand many years back (maybe about 2003 or 2004?) that came up with a through the bar inside a tube flagging line but it never caught on.
Gaastra made a kite with double bladders in the LE so there was a stiffening rib between them.
Aaron's handlepass ring that got banned.
I remember those because I had come up with the same ideas just before they appeared. Necessity being the mother of invention kinda coincidence.
First Naish 4 line kite the AR5.
First bow kite Takoon Nova?