Work-that one enjoys-is an invaluable unpatented medicine.
"Civics and Health"
William H. Allen
Out West, the west of the mesas and the unpatented hills, there is more sky than any place in the world.
"The Land Of Little Rain"
Mary Hunter Austin
He stated that when the commission was struggling with the problem, and examining all kinds of devices and plans, patented and unpatented, for which fabulous sums were often asked, the body turned to Edison in its perplexity and asked for advice.
"Edison, His Life and Inventions"
Frank Lewis Dyer and Thomas Commerford Martin