The plaintiff’s motion made on May 20, 1948, from whose denial this appeal has been taken, was a sequel to our decision in 19401 and to the steps taken under it. We then declared — as the only relief to which the plaintiff was entitled — that the defendant must add “in immediate juxtaposition” to the words, “Johnson’s Cleaner,” the suffix, “made by Johnson Products Company, Buffalo, N. Y.” We refused to forbid him the use of his name, “Johnson,” as the district judge had done, although we agreed that that use had “caused confusion among the plaintiff’s customers.” The judgment of the District Court was entered on our mandate on April 21, 1941, and the defendant adopted a new label in which the words: “Johnson’s Cleaner,” printed in blue ink at the top, are immediately followed around the bottom by the legend: “Made by Johnson Products Company, Buffalo, N. Y.,” printed in letters of red ink of the same size. The supplemental complaint alleged these facts and added that the original defendant, John W. Johnson, had turned over the business to a firm of five partners consisting of himself and four others, of whom only one was named Johnson. It alleged that this firm was doing business under the old name, “Johnson Products Company”; that the changed label did not conform to the decree; that the defendants’ use of the name, “Johnson’s,” was “likely to and does cause confusion or mistake, and deceive purchasers as to the source of origin of defendants’ product”; and that the only “effective protection that can be given to the public against confusion, mistake and deceit” was to prevent altogether the use by the defendants of the word, “Johnson’s,” as a brand or trade-mark. The plaintiff urges four reasons why it should be allowed to file this supplemental pleading: (1) that the label does not conform to the judgment; (2) that the original injunction did not give the plaintiff adequate relief or protect the public; (3) that the original defendant had taken in the four new partners; and (4) that the Lanham Act 2 has since been passed.
We agree that the judge had jurisdiction at any time to entertain a motion to modify the injunction;3 and it is not necessary to decide whether it was necessary as a preliminary for him to ask leave of this court because of our decision on the former appeal. The cause is now before us, and it would be a barren formality to reverse the order, grant leave to the judge to entertain that motion, have him enter a new order, and compel the plaintiff to appeal again. We shall therefore at once proceed to the merits. As to the first point, we hold that the new label exactly conforms to the decree. As to the second, we hold that it was irrelevant under the Act of 1905, 33 Stat. 724, that the suffix has not prevented all mistake and confusion. Upon this we have nothing to add to what we said before, when we very deliberately assumed that the public might still be confused after the prescribed change had been made. As to the third point, we hold that it makes no difference that the original defendant has now associated himself with four partners, three of whom do not bear his name. The business has continued under its original name and whatever rights it has gained since its origin in 1932, have inured to the benefit of *178the firm. For many years it has been the law that the old good-will passes with the business.4 The motion was a patent effort to procure a reargument after a lapse of seven years, and has not the slightest justification save for the enactment of the Lanham Act in 1946. To this we address ourselves as the only point deserving discussion.
That act did indeed put federal trade-mark law upon a new footing. The Act of 1905 had made the registration of a trade-mark only prima facie evidence of ownership, 5 and the question must be regarded as never finally settled whether it created a substantive federal trade-mark law, as distinct from the common-law of the states, or whether, it merely gave jurisdiction to the district courts and certain procedural advantages to the owner.6 The Lanham Act put an end to any doubts upon that score, and to the confused condition in which those doubts involved the whole subject, especially after Erie Railroad Company v. Tompkins'.7 These were fully discussed by Judge Wyzanski in his opinion in National Fruit Product Co. v. DwinnellWright Co.,8 but they ceased to be important after Congress provided that any infringer should “be liable to a civil action by the registrant for any or all the remedies hereinafter provided”; 9 and that the registration certificate once become “incontestable” after five years,10 should, with certain exceptions not here relevant, be conclusive evidence of the registrants’ exclusive right to use it.11 This conclusion is confirmed, if confirmation is necessary, by the report of the Senate Committee, of which we quote a portion in the margin.12 Nevertheless, although it is no longer open to doubt that the present act created rights uniform throughout the Union, in the interpretation of which we are not limited by local law, it does not follow that, in determining what these are, we are not to be guided by the existing common-law, especially in regard to issues as to which that law was well settled in 1946. In the case at bar the issue is of the meaning of the following language: “any person who shall in commerce (a) use * * * any reproduction * * * of any registered mark,” which “use is likely to cause confusion or mistake or deceive purchasers as to the source or origin” of the goods on which the owner has used it, shall be liable to civil action. The parallel section of the Act of 190513 beginning at its second sentence was practically the same, except that it subjected to civil action only those who should “affix” the registered mark “to merchandise of substantially the same descriptive properties as those set forth in the registration.” Clearly a change, and a most substantial change, was intended, and the question is what that was.
The law of trade-marks, which is in any event only a part of the law of unfair competition, 14 was originally designed to protect the mark’s owner from the diversion of customers who would otherwise have bought of him. By 1905, however, this had been extended by making the mark in some situations cover goods on which the owner had never used it. So far as we have been able to find, the following are the only decisions in which federal *179courts had done so. In Carroll v. Ertheiler,15 Judge Butler allowed the manufacturer of smoking tobacco to enjoin the use of his mark on cigarettes, which he had never made. In Collins Co. v. Oliver Ames & Sons Corp.,16 Justice Blatchford extended the protection of a mark used on metal picks and hoes and other digging instruments, to metal shovels, which the owner had never made. In Celluloid Manufacturing Co. v. Read,17 Judge Shipman, on the other hand, dismissed the plaintiff’s bill, seeking to enjoin the defendant’s use of the word, “Celluloid,” upon laundry starch, because starch was remote from anything which the plaintiff sold. In Godillot v. American Grocery Co.,18 Judge Acheson held a mark used upon general groceries to include coffee and cigars, which the plaintiff had never sold. It will be observed that in all these cases the sales held to infringe were of goods which were “substantially of the same descriptive properties as those set forth in the registration”; and that on the occasion when that was not true, the owner of the mark failed. It seems safe to infer that, when the Act of 1905 used the language we have quoted it intended any rights which it conferred to be coextensive with those which the law of unfair competition recognized, so far as it had developed up to that time.
By 1917 the English courts in a number of decisions, not necessary to consider, had meanwhile extended the cover of a mark or of a make-up considerably further than any of the cases we have cited, or than our own intervening decisions, such as Florence Manufacturing Co. v. Dowd,19 and British-American Tobacco Company v. British-American Cigar Stores Co.,20 and they have developed a rationale of the interests to be protected which was more definite than anything in our own books. In Aunt Jemima Mills Co. v. Rigney & Co.,21 we adopted this reasoning in a case where the infringing goods were syrup and the mark was for pancake flour; that has become the leading case in this country for the now well-established extension of the law of unfair competition in such situations.22
Thereafter the question several times arose whether this doctrine was within the terms of the Act of 1905; that is, whether “substantially of the same descriptive properties” referred to the physical character of the goods to which the protection of the mark alone extended, or whether it also covered any of which the owner of the mark might be supposed to be the source. We twice at least strongly intimated that it meant the second, although we recognized that this did some violence to the literal meaning of the words;23 but the weight of authority was the other way, 24 and in 1946 it was at best most uncertain whether the Act of 1905 went beyond the law of unfair competition in 1905. It is quite enough to explain the change of diction in the Lanham Act that Congress wished to do no more than clear up this doubt — if indeed it was not more than a doubt — and make the protection of the new right coextensive with the law of unfair competition as it was in 1946, just as the Act of 1905 had made it coextensive with the law of 1905. Besides, not only is this a sufficient reason for the change, but there is the strongest possible reason for not reading the language literally, because to do so would frequently result in great hardship to others, and give to the first user of a mark a wholly unjustified power to preempt new markets.
The “Aunt Jemima Doctrine,” as we may for brevity call it, needs to be indeed carefully circumscribed. It recognizes two, but only two, interests on which the *180owner can stand: (1) the possibility that the trade practices of the second user may stain the owner’s reputation in the minds of his customers; and (2) the possibility that at some time in the future he may wish to extend his business into that market which the second user has begun to exploit. These are legitimate interests and they are properly weighed against the second user’s interests; but it is far from true that the mere fact of confusion between the two users should always and of itself tip the scales in favor of the first. In Emerson Electric Manufacturing Co. v. Emerson Radio & Phonograph Corporation25 and Dwinell-Wright Company v. White House Milk Company, Inc.,26 we tried to show how the power of a first user to establish such a premonitory lien upon a future market might lead to great injustice.27 In deciding such “interstitial” issues, which legislatures at times wisely leave to them, courts are obliged to take over their function pro hac vice and to decide which of the conflicting interests they think should prevail. The case at bar is an admirable example of how unfairly a literal enforcement of the language of the new act may operate. The plaintiff does not sell cleaning fluid; it makes waxes and other polishes, and the defendants cannot possibly turn away from it any customers who would buy these instead of cleaning fluids. When John W. Johnson began business in 1932 he did so under his own name — the customary and innocent identification of his goods with himself. After three years the plaintiff tried to stop his use, and it was unsuccessful in 1941; not, as we then said, because no confusion had developed, for some had, and was probably to some degree inevitable; but because we held that the resulting prejudice to the plaintiff did not counterbalance Johnson’s interest in doing business under his own name. After a lapse of five years — in 1946 — the Lanham Act was passed, and, if the plaintiff is right, it has destroyed the assurance, which our decision gave to Johnson and his present associates, that the good-will they built up in the name of “Johnson” they would be allowed to enjoy. True, nobody likes to have his reputation subject to the hazards of another’s conduct; but there is no suggestion that in fact the defendants have tarnished the plaintiff’s name in the minds of those who may think they are buying its goods. Again, although the plaintiff may at some future time wish to make cleaning fluids, it does not now even intimate such a purpose. We cannot conceive any justification in these circumstances for-allowing it to reach a choking hand into a market not its own, and to deprive the defendants of an interest, natural and proper in its origin, and after sixteen years presumably an important element in their business. If Congress really meant to allow every first user of a mark so to stifle all excursions into adjacent markets upon showing no more than that confusion would result, it seems to us that it would have said so more clearly. In the case of fabricated marks which have no significance, save as they denote a single source or origin of the goods to which they are attached, the first user’s right may indeed go so far. The second user can then show no interest of his own; and if, as. will then appear, his only purpose is to trade on the first user’s good-will, it is indeed time to intervene. That situation is polar to this, and we do not believe that both have been swept into a common condemnation by the language used to create the new federal right.
Order affirmed.