"Paul Tomblin" wrote in message
...
In a previous article, "Private" said:
they are superior to the Phillips in every way. IIRC there is some real
historical chauvinism that resulted in the use of the Phillips design in
the
USA and the rejection of the superior Robertson.

"historical chauvinism" is sometimes spelt "high licensing fees".


IIRC this was part of the problem in this case. I suspect that any patent
would have expired by now, but perhaps there is a surviving copyright.

Happy landings,