Okla. Stat. tit. 15, § 15-682: Contract to be in writing - Copy to customer - Written

statement to customer and summary of terms.

A. Every contract for invention development services shall be

in writing and shall be subject to the provisions of the Invention

Development Services Act. A copy of each fully executed, written

contract shall be given to the customer at the time the customer

signs the contract.

B. If one or more contracts are contemplated by the invention

developer in connection with an invention or if the invention

developer contemplates performance of services in connection with an

invention in more than one phase with the performance of each phase

covered in one or more contracts, the invention developer shall so

state in a written statement and shall supply to the customer the

written statement together with a copy of each contract or a written

summary of the general terms of each contract, including the total

cost or consideration required from the customer, before the

customer signs the first contract.