delivered the opinion of the Court.
The sole issue in this patent infringement suit, filed in the Northern District of Indiana, is whether as a matter of law respondent Allbright-Nell Co., an Illinois manufacturer, by opеnly assuming and controlling in this action the defense of its customer, respondent Peter Eckrich & Sons, Inc., of Indiana, subjected itself to the jurisdiction of thаt court and waived the statutory venue requirements of 28 U. S. C. § 1400 (b).
1
The motion of
*261
Allbright-Nell to dismiss as to it because venue in the Northern District of Indiana was improper was sustained without opinion. The Court of Appeals affirmed,
Allbright-Nell manufactured the alleged infringing device, a machine for cutting sausage meat, known as the “ANCO Emulsitator.” It sold some of the devices to Eckrich, whose principal place of business was at Fort Wayne, Indiana. In the contract of sаle, Allbright-Nell agreed to defend any infringement suits which might be filed against Eckrich involving the device and to bear all of the expense thereof, including аny recovery. While Eckrich was using the machines, petitioners sued it in Indiana for infringement. 3 Pursuant to its contract, Allbright-Nell employed attorneys who defended the suit in the name of Eckrich. Thereafter, before any judgment was entered, petitioners amended their complaint, naming Allbright-Nell as a party defendant. Service was made upon Allbright-Nell by serving its president in Illinois. Motions to quash (on the ground that such service was made outside of the jurisdiction of the court) and to dismiss (on the ground that venue under § 1400 (b) was improper) were promptly filed. The petitioners admit that this service conferred no jurisdiction on the court and also concede that Allbright-Nell had no place of business in Indiana and, therefore, under § 1400 (b), venue as to it could not lie in Indiana. However, they urge that *262 the presence of Allbright-Nell through the attorneys, openly defending and controlling the suit against Eckrich, gave the court jurisdiction over the former. 4 In effect, petitioners argue, Allbright-Nell was in fact before the court protecting its own interests, was acting only аs a “puppeteer” of Eckrich, and was seeking all the benefits of litigation but attempting to avoid all of its responsibilities, save the ultimate application of res judicata. It, therefore, should be deemed to have entered a general appearance and waived its objection to venue. In the face of § 1400 (b), however, we think not.
While objection to venue “may be lost by failure to assert it seasonably, by formal submission in a сause, or by submission through conduct, . . . courts affix to conduct [such] consequences as to place of suit consistent with the policy behind” the applicable venue statute.
Neirbo Co.,
v.
Bethlehem Corp.,
In fact, the petitioners would have us do now what this Court specifically refused to do 45 years ago in
Merriam Co.
v.
Saalfield,
“ [I] f the decree [of injunction and accounting] . . . was not final as between appellant [Mеrriam Co.] and Saalfield, it cannot be res judicata as against Ogilvie; and thus the fundamental ground for proceeding against the latter by . . . substituted service of process disappears. This sufficiently shows the *264 weakness of appellant’s position, which, upon analysis, is found to be this: that upon the theory that Ogilvie would be estopped by a final decree if and when made, it sought to bring him into the suit, before final decree, as if he were already estopped. However convenient this might be to a complainant in appellant’s position, it is inconsistent with elementary principles.” At pp. 28-29.
Petitiоners stress that here the conduct of Allbright-Nell continued
after
it was named a party. We are not persuaded that this has any bearing upon the issue to bе decided. The conduct which will amount to a waiver of venue is that of the defendant alone and nothing a plaintiff might do can change the legal consequences which attach to that conduct. Cf.
Olberding
v.
Illinois Central R. Co.,
Petitioners insist that this result exalts form over substance. We think not. “The requirement of venue is specific аnd unambiguous; it is not one of those vague principles which, in the interest of some overriding policy, is to be given a ‘liberal’ construction.” Olberding v. Illinois Central R. Co., supra, at 340.
Affirmed.
Notes
28 U. S. C. § 1400 (b):
“Any civil action for patent infringement may be brought in the judicial district where the defendant resides, or where the defendant has committed acts of infringement and has a regular and established place of business.”
The appeal was allowed under 28 U. S. C. § 1292 (b) on the certificate of the District Court that the order dismissing Allbright-Nell involved a controlling question of law and that immediate appeal would materially advance the termination of the litigation. -
Subsequently, a second suit involving a different patent was filed in the same court, naming both of the respondents here as defendants. The court entered similar orders in it, and the cases were consolidated on appeal.
It is conceded that Allbright-Nell, by openly controlling the defense of this suit, in which it has an interest, will be bound by the final judgment and precluded by
res judicata,
from relitigating the same issues.
Souffront
v.
La Compagnie Des Sucreries De Porto Rico,
Some 30 years prior to that time this Court had occasion to pass on the effect of such conduct with relation to
res judicata
in
Lovejoy
v.
Murray,
