Quote:
On 2002-08-13 11:25, KingStardog wrote:
I would think an add on would infringe, if it depended entirely on the origional device.
Anyone else?
A true "add on" would be considered a wholly original work. Adding a gimmick that is not part of the original method, a booklet containing alternate methods, or plans for the user to modify the original equipment for a different effect should not be a problem if (1) your product contains no pieces from the original, (2) clearly states that your product requires the purchase of the other package in order to be workable, (3) cannot be reverse engineered to provide the customer with another person's product, and (4) does not tip the buyer to the other product's methods. If you can safely confirm that what you plan to sell meets these criteria, you may consider playing it safe by writing the originator of the effect and asking his blessings (along with a gift copy of your new product).
If it doesn't fit the above criteria, it's a derivative product. At that point, contacting the original creator is not a courtesy--it's a necessity--if you plan to release it for sale.
I guess the main point of my post is...it doesn't hurt to ask permission, even if you're legally within your rights to release the product without doing so.