IANAL, but NDAs are only enforcable when there is some actual liability on the table. Example, I'm sure the NDA for the Coca-Cola recipe is still in effect for

IANAL, but NDAs are only enforcable when there is some actual liability on the table. Example, I'm sure the NDA for the Coca-Cola recipe is still in effect for the lifetime since they still use the formula and it would actually do financial harm if it was to be released. In some places NDAs are invalid if they don't have an expiration term. Since Sony no longer makes the AIBO and I'm sure whatever proprietary tech it did have is out of date please, do tell.