The mark consists of a barnlike shaped structure located intermediate an upwardly curved line which contacts opposite sides of the building a short distance above the base of the building. The centered word MARTEN extends horizontally across the mark below the base of the structure. Immediately beneath the word MARTEN is a circle incorporating a pair of lines angled to each other as to represent 5 o'clock on a clock face. On opposite sides of the circle are horizontally extending lines each including a pair of spaced arrowheads which respectively point toward the circle. To the left of the left side line is the word "Hand" and to the right of the right side line is the word "Made". Beneath this are the horizontally extending centered words PORTABLE BUILDINGS in capital letters. Finally, beneath this wording is a line extending horizontally of the base of the mark with an open center section in which appears the capital letters LLC.