Mobydisc said...DrJ said...Mobydisc said...
Hoyle and Schweitzer have a patent on that rig.
Had a patent ........ Long long time expired, patents only last 20 years or so.
Thanks for bringing me up to date.... Here I was thinking it was 1982. Their patent didn't expire. The Australian patent was beaten in the courts coz some bloke sailed his canoe around the Swan River in the 1950s or something like that.
I was actually talking about the US provisional application which would have been the earliest recognized priority document under the Patent cooperation treaty, although to my recollection that was not recognized untill 1970, either way the patent would not be worth the paper it was printed on now. Although that said the actual document might actually be a collectors item
