Yea it's a similar story to the Frenchman Bruno Legainoux, he was the inventor of the bow kite and owns a patent on the design. I know that on the 2009 Cabrinha Crossbows near the tip where the serial number is printed it states 'Patent owned by Bruno Legainoux'.

The Frenchman made heaps of coin out of this patent and is widely regarded as being the inventor of the original LEI kite.

Kitepower Australia said...

Do you have a link to the patent details??

Not sure where the Delta patent details are, but here is some info on the Bow kite patent if interested...

Bruno Legainoux, the inventor of the classic LEI, took the bridle on the leading edge concept further and filed a patent application in French on 2004/03/01, in Canada and in US on 2005/02/28 (Canadian Patent Application number CA 2498729, US patent application number 11/067,0842) for a kite design that incorporated a bridle on the leading edge with a flat, swept back profile and concave trailing edge. The US version of the patent application can be found at http://www.freepatentsonline.com/20050230556.pdf. The French version can be found at inflatablekite.com/siteinf/gb/docs/FR2866859%20bow.pdf

Kitepower Australia said...

Do you have a link to the patent details??

Here you go Steve

worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_EP&FT=D&date=20100415&CC=US&NR=2010090064A1&KC=A1

The airush DNA had a delta shape in 07 the 6m is a sik kite 3 struts etc....but F-1 defined it...the bandit 1 & 2 are still one of the best delta kites out there me rekons!.