HOW TO OBTAIN A PATENT.

1. The person desiring a patent must declare upon oath that he believes himself to be the inventor or discoverer of the art, machine, or improvement for which he solicits the patent.

2. He must also give in writing a definite and minute description of it, accompanied by drawings to illustrate. If necessary, he must make and deliver to the commissioner of patents a model of his invention.

To be patentable, the invention must be new, unused and unknown before, and useful.

The invention is carefully examined by the appropriate expert at the patent office, and if found to be deserving a patent is issued, signed by the secretary of the interior, countersigned by the commissioner of patents, and sealed with his seal. This gives the patentee the sole right of manufacture and sale and use for seventeen years. The right to make, sell, or use the invention may be sold by the patentee. He may assign the patent entire, an interest in it, or the exclusive right for a certain specified district.