U.S. v. Kyburz
[28 Phil 475 (1914)]

“Trade names are protected against use or imitation upon the ground of unfair competition, and Act No. 666 protects manufacturer or dealer, as well as the public, from unfair competition by the use of trade names upon the principle that no person has the right to sell his own goods as those of another.”

“In other words the principle is that no one may, by imitation or any unfair device, induce the public to believe that the goods he offers for sale are the goods of another, and thereby appropriate to himself the value of the reputation which the other has acquired for the products or merchandise manufactured or sold by him.”