Does membership of the ILP Vegetable give the right to ask for material from patent holders?
No, the ILP is about granting right under patents (licenses) not about the transfer of material.
Of course you can bilaterally ask the patent holder for material. If he agrees, you can include this in the license agreement.
Of course you can bilaterally ask the patent holder for material. If he agrees, you can include this in the license agreement.