delivered the opinion of the Court:
This is a suit in chancery, brought by the appellant, seeking to compel Dice to assign to it a certain invention for a device in the construction of what are called “check rowers, ” of which the bill charges that Dice is the original inventor, and also seeking to enjoin Dice from selling or assigning the same to any other person or persons. On hearing, the cir*650cuit court granted the relief sought. The complainant appealed to the Appellate Court, where the decree was reversed and the cause remanded, with directions to dismiss the bill. Complainant appeals to this court.
The bill charges that on October 18, 1881, the parties made a written contract, as follows:
“Articles of agreement entered into between the Joliet Manufacturing Company, of Joliet, Illinois, and Andrew F. Dice, now residing at Aurelia, Iowa: The said Andrew F. Dice agrees to work for the company named for the term of five years, from the 1st to the 15th of November next, in such capacity pertaining to the manufacturing of shellers and powers, and disposing of the same, as the company may consider for their best interest, as may be assigned by the president of the company; that he will work for the best interest of the company in every way that he can, and in whatever way such aid can be given shall belong to the company,—that is, improvements (previous to this date not included) that he may make or cause to be made. For which services the Joliet Manufacturing Company agree to pay the said Andrew F. Dice twenty-seven and one-half cents per hour, and agree to give him the privilege to make his time full,—that is, that time can be averaged so as to make ten hours per day the. year round,—for all such labor performed, computing that time every month, and pay the same the 10th of the following month.
“October 18, 1881.
The Joliet Manufacturing Co.,
By A. H. Shreffler, Prest.
A. F. Dice.”
The bill further charges that Dice entered the employment of the company in pursuance of this agreement, and a few months after this, and while Dice was so employed under this agreement, complainant (appellant) added to its business the manufacture of “check rowers, ”(an attachment to a *651machine for planting corn,) and that Dice was assigned to the superintendence of said manufacture of “check rowers, ” and entered upon this employment “as part of and in performance of” the above agreement, and so continued for some months; that during this service Dice made known to complainant that he had conceived an improvement in “check rowers, ” and upon the suggestion of Dice the complainant directed him to employ his time, in the interests of the company, in perfecting the invention for its benefit, complainant furnishing the materials and mechanical labor in experimenting and perfecting the improvement, and that this was done,—Dice, in the meantime, receiving full pay for his time and services, according to the ternls of the written contract, and thus the invention was perfected and developed, and is the proper subject for a patent. The bill was answered by Dice., claiming to own the invention, and replication filed. The proofs tend to sustain the allegations of the bill, and also to show that Dice, while at work in making experimental structures in the shops of complainant, said that the improvement in the “ check rowers ” was being wrought out for the benefit of complainant. This some of the proofs contradict.
Assuming the facts to be as claimed in the bill, we think the decree of the circuit court was properly reversed. The general rule is, that where a mechanic, in laboring for an employer in the construction of a machine, invents a valuable improvement, the invention is the property of the inventor, and not that of his employer. It may be true that where the employer hires a man of supposed inventive mind to invent for the employer an improvement in a given machine, under a special contract that the employer shall own the invention when made, and under such employment such improvement is invented by the person so employed, such invention may, in equity, become the property of the employer. But the law inclines so strongly.to the rule that the invention shall be the property of its inventor, that nothing short of a clear *652.and specific contract to that effect will vest the property of the invention in the employer, to the exclusion of the inventor. In this case the bill sets up no specific contract that Dice should invent an improved “check rower,” the invention of which should be the property of complainant. The only specific contract set up is the written contract. That provides, in substance, that future improvements in the manufacture of “shelters and powers” to be made by Dice, “shall belong to” complainant.
It is said that the provision of the written contract, “that he will work for the best interests of the company in every way that he can, ” and that such aid, in whatever way given, “shall belong to the company,—that is, future improvements that he may cause to be made, ”—is broad enough to include the invention of the improved “check rowers.” Taken in connection with the context,—the preceding provisions,— these words clearly have reference only to improvements to be made in “shelters and powers, ” and have no reference to “check rowers.”
Nor do we think that when Dice consented to devote part of his time in superintending the manufacture of “check rowers, ” and also to devote part of his time to the making of an improved “check rower, ” he thereby necessarily contracted that the invention, when perfected, should be the exclusive property of complainant. The circumstances set up may render the machine actually made the property of complainant, and in equity may really amount to a license to complainant to use the machine made, and possibly to a license to make and use other like machines. Of this latter we express no opinion. But it seems clear that the facts alleged give to complainant no title, either legal or equitable, to the invention, of such a character as' to make it the duty of Dice to assign to the complainant the right to the invention, and to a patent which may issue for the invention.
The judgment of the Appellate Court is therefore affirmed.
Judgment affirmed.