Indiana Code Title 24. Trade Regulation § 24-11-3-3

(A) demand letter lacks the information described in section 2(a)(1) of this chapter;  and

(B) target requests the information;

(A) establish that the target has infringed the patent;  and

(B) negotiate an appropriate remedy.

(A) use of the patent;  or

(B) production or sale of a product or item covered by the patent.

(A) the inventor or joint inventor of the patent;  or

(B) if the patent was filed by and awarded to an assignee of the original inventor or joint inventor, the original assignee.

(A) demonstrated good faith business practices in previous efforts to enforce the patent or a substantially similar patent;  or

(B) successfully enforced the patent, or a substantially similar patent, through litigation.