¶1Mr. F. Delano Putnam, Assistant Attorney General of Massachusetts, with whom Messrs. Arthur K. Reading, Attorney General, and R. Ammi Cutter, Assistant Attorney General, were on the brief, for petitioner.
¶2All that a patentee obtains by his patent is the right to exclude others from the use, manufacture, or sale of the process patented. A patent once granted is merely *143an intangible property interest of the patentee. The right to exclude alone is unique. Missouri v. Bell Tel. Co., 23 Fed. 539; Grant v. Raymond, 6 Pet. 220; Bloomer v. McQuewan, 14 How. 539; Paper Bag Patent Case, 210 U. S. 405; Bauer v. O’Donnell, 229 U. S. 1; Motion Picture Patents Co. v. Universal Film Co., 243 U. S. 502.
¶3The sole federal purpose is accomplished when the patent is granted — viz., the promotion of science and the useful arts by obtaining from inventors a public announcement of their progressive achievements in exchange for the monopoly granted to them for a limited time. Denning Wire & Fence Co. v. American Steel & Wire Co., 169 Fed. 793; O’Brien Worthen Co. v. Stempel, 209 Fed. 847; I. T. S. Rubber Co. v. Essex Co., 276 Fed. 478; Pennock v. Dialogue, 2 Pet. 1; Kendall v. Winsor, 21 How. 322; Motion Picture Patents Co. v. Universal Film Mfg. Co., 243 U. S. 502.
¶4Neither the federal purpose behind the patent powers given to Congress by the Constitution nor the patentee’s right to exclude is hampered in any way by state taxation of the net income of the patentee computed upon a gross income in which is included patent royalties. Once a patent is granted, it is within the power of a state to legislate within a wide range of discretion with respect to the exercise of the patent rights and to the use and manufacture of patented articles, so long as no interference with the right to exclude takes place. Patterson v. Kentucky, 97 U. S. 501; Webber v. Virginia, 103 U. S. 344; Allen v. Riley, 203 U. S. 347; Woods & Sons Co. v. Carl, 203 U. S. 358; Ozan Lumber Co. v. Union County Bank, 207 U. S. 251; Ager v. Murray, 105 U. S. 126; Pacific Bank v. Robinson, 57 Cal. 520; Luckett v. Delpark, 270 U. S. 496; Machine Co. v. Gage, 100 U. S. 676; Emert v. Missouri, 156 U. S. 296.
¶5In order that a property interest may be permitted to escape state taxation as a federal instrumentality, it must *144appear that the interest in question bears some substantial and intimate relation to the continued operation of a federal constitutional purpose. A patent is merely the reward given for the disclosure of an invented process by virtue of a contract with the government which by its terms includes no provision that the reward or its avails shall be exempt from state taxation. By far the greater number of cases dealing with the implied prohibition of the exercise of the States’ taxing power with respect to federal instrumentalities have dealt with the taxation by the State of property interests in active use in accomplishing a decided federal purpose. McCulloch v. Maryland, 4 Wheat. 316; Home Savings Bank v. Des Moines, 205 U. S. 503; Farmers Bank v. Minnesota, 232 U. S. 516; Smith v. Kansas City Title & Trust Co. 255 U. S. 180; Clallam County v. United States, 263 U. S. 341; First Nat. Bank v. Anderson, 269 U. S. 341; Northwestern Mut. Life Ins. Co. v. Wisconsin, 275 U. S. 136.
¶6It can hardly be said that the patentee is in any sense an agent of the Federal Government, yet even if he were such an agent, he could be taxed with respect to the property employed by him as such an agent so long as no governmental function performed by him was taxed.
¶7Railroad Co. v. Peniston, 18 Wall. 5, so clearly supports the jurisdiction of a State under the Constitution to lay a “tax which remotely affects the efficient exercise of a federal power” that it would be difficult to see how it could be contended that taxation of a patent or of the avails of a patent in any way hampered the Federal Government in promoting science and the useful arts by the process of exclusion (the only constitutional method available to the Federal Government), were it not for the dictum in McCulloch v. Maryland, 4 Wheat. 316, and for the decisions in the Oklahoma tax cases where the Federal Government’s functions with respect to the pro*145tection of the Indians were held to be impeded by the state taxes there involved. Distinguishing Choctaw & Gulf R. R. Co. v. Harrison, 235 U. S. 292; Railroad Co. v. Peniston, 18 Wall. 5; Indian etc. Oil Co. v. Oklahoma, 240 U. S. 522; Gillespie v. Oklahoma, 257 U. S. 501; Jaybird Mining Co. v. Weir, 271 U. S. 609. See Dyer v. Melrose, 197 Mass. 99.
¶8Commonwealth v. Westinghouse Electric Co., 151 Pa. 265, and People v. Assessors, 156 N. Y. 417, fall into the error of considering patents on the same footing as the federal franchise drawn in question in California v. Central Pacific R. R. Co., 127 U. S. 1, and as the mails and the mint.
¶9People v. Assessors, supra,relies largely on cases'overruled by this Court in' Allen v. Riley, 203 U. S. 347, and Campbell v. Haverhill, 155 U. S. 610.
¶10The tax imposed no perceptible or appreciable burden upon the ability of the Federal Government or any agent thereof to perform any federal function.
¶11Mr. Merrill S. June, with whom Mr. Thomas H. Gage was on the brief, for respondent.
¶13delivered the opinion of the Court.
¶14These causes present the question whether the State of Massachusetts may tax, as income, royalties received by one of her citizens for the use of patents issued to him by the United States. The Supreme Judicial Court of that State held such an imposition would amount to a tax upon the patent right itself and was prohibited by the Federal Constitution. We agree with that conclusion.
¶15The Constitution (Art. 1, Sec. 8) empowers Congress “ to promote the progress of science and useful arts, by securing for limited times to authors and inventors the *146exclusive right to their respective writings and discoveries; . . . ” The first Congress provided for issuance, in the name of the United States, of letters patent granting “ for any term not exceeding fourteen years, the sole and exclusive right and liberty of making, constructing, using and vending to others to be used, the said invention or discovery . ' . Act April 10, 1790, Sec. 1, Chap. 7, 1 Stat. 109.
¶16Chap. 230, Act July 8, 1870,- 16 Stat. 201 (Rev. Stat. Sec. 4884; Sec. 40, Title 35, U. S. Code)—
¶17“ Sec. 22. And be it further enacted, That every patent shall contain a short title or description of the invention or discovery, correctly indicating its nature and design, and a grant to the patentee, his heirs or assigns, for the term of seventeen years, of the exclusive right to make, use and vend , the said invention or discovery throughout the United States and the Territories thereof, . . .”
¶18Chief Justice Marshall, speaking for the court in Grant v. Raymond, 6 Pet. 218, 241-242, stated the general purpose for which patents issue—
¶19“ To promote the progress of useful arts, is the interest and policy of every enlightened government. . . . This subject was among the first which followed the organization of our government. It was taken up by the first congress . .. . The amendatory act of 1793 contains the same language, and it cannot be doubted that the settled purpose of the United States has ever been, and continues to be, to confer on the authors of useful inventions an exclusive right in their inventions for the time mentioned in their patent. It is the reward stipulated for the advantages derived by the public for the exertions of the individual, and is intended as a stimulus to those exertions. The laws which are passed to give effect to this purpose ought, we think, to be construed in the spirit in which they have been made. . . . The public yields *147nothing which it has not agreed to yield; it receives all ' which it has contracted to receive. . .. .”
¶20Kendall v. Winsor, 21 How. 322, 327-328—
¶21“ It is undeniably true, that the limited and temporary monopoly granted to inventors was never designed for their exclusive profit or advantage; the benefit to the pub,lic or community at large was another and doubtless the primary object in granting and' securing that monopoly.”
¶22Bloomer v. McQuewan, 14 How. 539, 549—
¶23“ The franchise which the patent grants, consists altogether in the right to exclude every-one from making, using, or vending the thing* patented, without the permission of the patentee.. This is all he obtains by the patent.”
¶24See also Paper Bag Patent case, 210 U. S. 405, 423; Bauer & Cie v. O’Donnell, 229 U. S. 1, 11.
¶25The power to exclude others granted by the United States to the patentee subserves a definite public purpose — to promote the progress of science and useful arts. The patent is the instrument by which that end is to be accomplished. It affords protection during the specified period in consideration of benefits conferred by the inventor. And the settled doctrine is that such instrumentalities may not be taxed by the States.
¶26. In California v. Pacific Railroad Co., 127 U. S. 1, the State sought to sustain a tax laid upon a franchise granted by the United States; but its.power therein was denied. Through Mr. Justice Bradley this court said; — “Recollecting the fundamental principle that the Constitution, laws and ti^aties of the United States are the law of the land · Case Law">supreme law of the land, it seems to us almost absurd to contend that a power given to a person or corporation by the United States may be subjected to taxation by a State.” The same general doctrine was approved by McCullough v. Maryland, 4 Wheaton, 316; Home Savings Bank v. Des Moines, 205 U. S. 503; Farmers, etc. Bank v. Min*148nesota, 232 U. S. 516; Choctaw & Gulf R. R. Co. v. Harrison, 235 U. S. 292; Indian Terr., etc. Oil Co. v. Oklahoma, 240 U. S. 522; Smith v. Kansas City Title & Trust Co., 255 U. S. 180; Gillespie v. Oklahoma, 257 U. S. 501; Clallam County v. United States, 263 U. S. 341; First National Bank v. Anderson, 269 U. S. 341; Jaybird Mining Co. v. Weir, 271 U. S. 609; Northwestern Mutual Life Ins. Co. v. Wisconsin, 275 U. S. 136.
¶27The courts of last resort in Pennsylvania and New York have held that a State may not tax patents granted by the United States. Westinghquse Elec. Mfg. Co. v. Commonwealth, 151 Pa. 265; People, etc. v. Assessors, 156 N. Y. 417. And no opinion to the contrary has been cited.
¶28As United States patents grant only the right to-exclude, our conclusion • is not in conflict with those cases which sustain the power of the States to exercise control over articles manufactured by patentees, to regulate the assignment of patent rights, and to prevent fraud in connection therewith. Patterson v. Kentucky, 97 U. S. 501; Webber v. Virginia, 103 U. S. 344; Allen v. Riley, 203 U. S. 347; John Woods & Sons v. Carl, 203 U. S. 358; Ozan Lumber Co. v. Union County National Bank, 207 U. S. 251.
¶29The challenged judgments are affirmed.
¶30Affirmed.
¶32These are. complaints brought by the respondent against the Commissioner of Corporations and Taxation of Massachusetts for the abatement of income taxes for the years 1921 and 1922. The question raised as stated by the Supreme Judicial Court of the State is whether the Commonwealth has the right to tax the income received from royalties. for the use of' patents issued by the United States. That Court held that the Commonwealth had no such right under the-Constitution of the United States *149and the Commissioner obtained a writ of certiorari from this Court.
¶33The reasoning of the Court is simple. If the State ‘ cannot tax the patent, it cannot' tax the royalties received from its use’. The postulate is founded on the casual intimation of Chief Justice Marshall in McCulloch v. Maryland, 4 Wheat. 316, 432, and is said to have been conceded below by the Commissioner. It hardly is conceded here and, whether it is or is not, if this Court should be of opinion that the conclusion urged by the Commissioner can be supported upon broader grounds than he felt at liberty to take, the .Court is not estopped by his doubts. Why then cannot a State tax a patent by a tax that in no way discriminates against it? Obviously it is not true that patents are instrumentalities of the Government. They are used by the patentees for their private advantage alone. If the Government uses them it must pay like other people. Richmond Screw Anchor Co. v. United States, 275 U. S. 331. The use made by the patentee may be not to make and sell the patented article but simply to keep other people from doing so in aid of some collateral interest of his own. Continental Paper Bag Co. v. Eastern Paper Bag Co., 210 U. S. 405, 422, 424. .National banks really are instrumentalities of the.,Government and directly concern the national credit. Indians are wards of the nation. Interstate commerce is left expressly to regulation by Congress and the States can intermeddle only by its consent. In this case the advantages expectpd by the Government are mainly the benefits to, the public’when the patent has expired and secondarily the encouragement of invention, Pennock v. Dialogue, 2 Peters, 1, 19. The most that can be said is that a tax is a discouragement so far as it goes and to that extent in its immediate operation runs counter to the Government intent. But patents would be valueless to their owner , without the organized societies constituted by the *150States, and the question is why patents should riot contribute as other property does to maintaining that without which they would be of little use.
¶34Most powers conceivably may be exercised beyond the limits allowed by the law. Rights that even seem absolute have these qualifications. American Bank & Trust Co. v. Federal Reserve Bank of Atlanta, 256 U. S. 350, 358.
¶35But we do not on that accourit resort to the blunt expedient of taking away altogether the power or the right. Board of Trade v. Christie Grain & Stock Co., 198 U. S. 236, 247, 248. The power to tax is said to be the power to destroy. But, to repeat what I just.now have had occasion to say in another case, this Court, which so often has defeated the attempt to tax in certain ways, can defeat an attempt to discriminate or otherwise to go too far without wholly abolishing the power to tax. The power to fix rates is the power to destroy,' but this Court while it endeavors to prevent confiscation does not prevent the fixing of rates. Even with regard to patents some laws of a kind'that might destroy the use of them within the State have been upheld. Patterson v. Kentucky, 97 U. S. 501. Webber v. Virginia, 103. U. S. 344. Emert v. Missouri, 156 U. S. 296. They must be reasonable or they will be held void, but if this Court deems thena reasonáble they stand. Allen v. Riley, 203 U. S. 347, 355.
¶36The fact that the franchise came from a grant by the United States is no more reason for exeinption, standing by itself, than is the derivation of the title to a lot of larid from the same source. Tucker v. Ferguson, 22 Wall. 527. In Baltimore Shipbuilding & Dry Dock Co. v. Baltimore, 195 U. S. 375, the land was conveyed subject 'to a condition that a dry-dock should be built upon if which the United States was) to have the right to use free from charge for docking arid which was to reyert to the'United States on a diversion of the land to any .other use or on *151the dry-dock being unfit for use for six months, tíertainly a case in which the United States was much more clearly interested than in an ordinary patent. Yet there it was held that neither the company nor the land was an instrumentality of the United States and that there was nothing to hinder the right of the State to tax. See further Forbes v. Gracey, 94 U. S. 762.
¶37Mr. Justice Brandéis, Mr. Justice Sutherland and Mr. Justice Stone agree with this opinion.