the pattent number: 5811710, (which is the oldest), it was filed in 22 sep in 1998, according to this article:
When does a patent expire? | FPO Communities
It will expire in 2015... so... again my cuestion....maybe is posible to change something to make it legal?
When does a patent expire? | FPO Communities
It will expire in 2015... so... again my cuestion....maybe is posible to change something to make it legal?
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