Every trademark so adopted shall, from the date thereof, be the exclusive property of the person adopting the same. The proprietor of such trademark shall, in using the same, cause it to be plainly stamped, branded or otherwise impressed upon each piece of timber upon which the same is placed. (1889, c. 142; 1903, c. 261, ss. 3, 4; Rev., s. 3025; C.S., s. 3987.)