From the Slashdot coverage ( http://yro.slashdot.org/article.pl?sid=09/04/22/1545238 http://yro.slashdot.org/article.pl?sid=09/04/22/1545238 ) the patent is htt

From the Slashdot coverage ( http://yro.slashdot.org/article.pl?sid=09/04/22/1545238 http://yro.slashdot.org/article.pl?sid=09/04/22/1545238 ) the patent is http://www.freepatentsonline.com/5487069.html http://www.freepatentsonline.com/5487069.html . That was filed in 1993, but the OP said filing was in '92. The '92 filing could have been the Australian filing as opposed to the US one a few months later.