Putnam's Handy Law Book for the Layman

by Albert Sidney Bolles

A patent also calls for the exercise of inventive power. Though invention must be seen in every patent, it is difficult to define. Says a former commissioner of patents, Justice Duell: "It is a matter resting in judgment and therefore no fixed rule for its determination is possible." Some principles, however, assist in defining the term. "Thus, it is declared that an act of invention is primarily mental and involves the conception or mental construction of a means not previously known for accomplishing a useful result. It is not the mere adaptation of old means by common reasoning, but is the construction of new means through an exercise of the creative faculties of the mind." Between invention and discovery the patent laws draw no distinction. Again, it has been often said that the design of the patent laws is to reward those who make a substantial invention or discovery, which is an additional step in the useful arts. The law never intended to grant a monopoly for every trifling device which would naturally occur to a skilled mechanic in the ordinary progress of manufacture.

An article of manufacture is not patentable because means have been devised to make it more perfectly than before; it must be new in itself and not merely in its workmanship. A machine-made article therefore is not patentable simply because it is thus made, and no longer by hand.

The substitution of an art, manufacture, or composition of matter of one element or device for another which does the same thing in the same way and accomplishes a similar result is not invention. Even if the substituted part performs the function better, there is no patentable invention unless some new function or result is secured. Changes therefore of the relative location of parts without changing the functions performed by them are not an invention, nor is the omission of a part with a corresponding omission of function.

A patent can issue only to the inventor, or if he is dead to his executor or administrator. If there be two original inventors the one who first made it or brought it to this country is entitled to a patent. A patent granted on the application of a non-inventor is void. By first inventor is meant the one who first had a mental conception of the invention provided he exercised diligence in perfecting it. If there be a rival claimant the party who first reduced to practice the invention was, until the contrary fact is shown, the first inventor. One who merely utilizes the ideas of others is not an original inventor and is not entitled to a patent. In the United States any person, regardless of residence, citizenship or age may obtain a patent.

An invention is reduced to practice when it is so far perfected that it may be put into practical and successful use. The machine may not be perfectly constructed, but it embodies all the essential elements of the invention. Demonstration of its success by actual use is usually necessary, but not always. The reduction to practice must be by the applicant for a patent, or by his agent; to do this by a third party will not suffice. The person who first conceived the invention, but was later than his rival in reducing it to practice, is not regarded as the first inventor unless he exercised due diligence to perfect his invention after the time that his rival entered the field against him.

Two or more parties may contribute in developing an idea and producing an invention, which is truly the result of their joint mental efforts, and not the separate invention of either. In such case both must apply for the patent, which is granted to them jointly. But if a patent is thus issued to two and only one of them is the inventor, the patent is invalid. Nor can one of two joint inventors make application and secure the patent on assignment from the other; both must join.

The patent must issue on the application of and in the name of the real inventor even though he was employed to make it for the benefit of another. Notwithstanding, the employer is the owner of the patent and may compel the patentee to transfer it to him. Of course their respective rights may be changed by agreement. If no agreement exists, a company that employs a skilled workman to make improvements on its machinery is not entitled to the patents granted to the workman. Says Justice Duell: "An employee, performing all the duties assigned to him in his department of service, may exercise his inventive faculties in any direction he chooses with the assurance that whatever invention he may thus conceive and perfect is his individual property. The company, however, has an implied license to make, use and sell the invention."

Where a party employs another to assist him in perfecting an invention the presumption is that the employer is the real inventor of the thing produced by their joint effort. On the other hand, where a person is employed to exercise his inventive skill, because he is known to be the possessor of it, Edison for example, the presumption is in favor of the employee. Government employees may secure patents on inventions made by them during their employment, after their relationship has ceased. The government may have an implied license to use the invention without any title thereto.

Patents may be issued and reissued to assignees on the application of inventors. On the death of an inventor before a patent has been issued to him, his executor or administrator may apply therefor, who takes the patent in trust for the heirs. A foreign executor or administrator may make a similar application. He must, however, present a proper certificate of his authority to act. Likewise, a legally appointed guardian or conservator of an insane inventor may apply for and obtain a patent in trust for him.

The inventor must apply to the commissioner of patents for letters patent which secure to him his invention. The application comprises a petition, specification, claims, oath, drawings if the nature of the invention may be thus shown, and a model, when this is required by the patent office. A fee of fifteen dollars also must be sent with the papers. The application must be signed by the inventor and two witnesses.