In re TS Tech opened a run of transfer petitions that turned the Federal Circuit into the busiest mandamus court in the federal system.
Mandamus is described everywhere as rare. In one corner of federal practice it is not. The Federal Circuit hears petitions challenging denials of transfer in patent cases as a regular part of its docket, and it grants them often enough that filing one is a standard strategic option rather than a last resort.
The line begins with In re TS Tech USA Corp., 551 F.3d 1315 (Fed. Cir. 2008), decided weeks after the Fifth Circuit's en banc decision in In re Volkswagen of America, Inc., 545 F.3d 304 (5th Cir. 2008). A second, separate development followed in 2017, when TC Heartland LLC v. Kraft Foods Group Brands LLC, 581 U.S. 258 (2017), narrowed where a patent case may be filed at all.
Why the petitions concentrate here
28 U.S.C. § 1295(a)(1) gives the Federal Circuit exclusive appellate jurisdiction over civil actions arising under the patent laws. Every patent transfer dispute in the country therefore reaches the same court, whatever district it started in. Three conditions combine.
- One appellate forum. Doctrine that would develop separately in twelve regional circuits develops in one, so each grant is a precedent the next petitioner can cite.
- Case concentration. Patent filings have clustered in a few districts, producing a steady supply of defendants with no connection to the forum and a strong transfer argument.
- No alternative route. A denial of transfer is not final under 28 U.S.C. § 1291, is not a collateral order, and depends on the district judge for certification under 28 U.S.C. § 1292(b). The writ is the only immediate vehicle.
Whose law the Federal Circuit applies
The court does not use a single body of law for venue questions, and the division determines which precedents a petition should cite.
| Question | Governing law | Why |
|---|---|---|
| Transfer for convenience under 28 U.S.C. § 1404(a) | Regional circuit law | A procedural question not unique to patent law; In re TS Tech applied Fifth Circuit law as stated in In re Volkswagen |
| Whether venue is proper under 28 U.S.C. § 1400(b) | Federal Circuit law | A question unique to patent litigation |
| Who bears the burden of establishing proper venue | Federal Circuit law | In re ZTE (USA) Inc., 890 F.3d 1008 (Fed. Cir. 2018), places it on the plaintiff |
| Whether a venue objection was waived | Federal Circuit law | In re Micron Technology, Inc., 875 F.3d 1091 (Fed. Cir. 2017) |
| The mandamus standard itself | Cheney v. United States District Court, 542 U.S. 367 (2004) | The Supreme Court's three conditions apply in every circuit |
The errors In re TS Tech identified
TS Tech granted the writ and directed transfer out of the Eastern District of Texas. Its value to later petitioners is that it named specific analytical mistakes rather than simply disagreeing with the outcome.
- Overweighting the plaintiff's choice. Under In re Volkswagen the choice is accounted for in the movant's burden, not added as a separate factor.
- Ignoring the 100-mile rule. Witness inconvenience increases with distance, and a court that treats a cross-country trip as equivalent to a short drive has misapplied the factor.
- Misreading the local interest. Sale of an accused product throughout the country does not create a local interest in any particular district; the connection has to be to the events or the parties.
- Discounting access to proof. Physical and documentary evidence located near the transferee forum matters even when documents can be produced electronically.
The line of decisions that followed
A cluster of orders in 2009 and 2010 built out the framework, and each addressed a distinct argument that district courts had used to keep cases.
| Decision | Point established |
|---|---|
| In re Genentech, Inc., 566 F.3d 1338 (Fed. Cir. 2009) | A movant need not show that identified witnesses are key witnesses before their convenience counts |
| In re Hoffmann-La Roche Inc., 587 F.3d 1333 (Fed. Cir. 2009) | Records moved into the forum in anticipation of the venue dispute are entitled to no weight |
| In re Nintendo Co., 589 F.3d 1194 (Fed. Cir. 2009) | Where the transferee forum is clearly more convenient on the whole record, denial is an abuse of discretion |
| In re Zimmer Holdings, Inc., 609 F.3d 1378 (Fed. Cir. 2010) | A thin corporate presence assembled for litigation does not anchor a case to a district |
| In re Acer America Corp., 626 F.3d 1252 (Fed. Cir. 2010) | The convenience analysis is not defeated by the presence of a co-defendant with a marginal connection |
TC Heartland and the venue statute itself
Transfer answers where a case should be tried. Venue answers where it may be filed, and in patent cases the answer is narrow. 28 U.S.C. § 1400(b) provides that a patent infringement action 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.
TC Heartland held that § 1400(b) is the sole and exclusive provision governing venue in patent infringement actions, and that for a domestic corporation residence under that section means only the state of incorporation. The decision reaffirmed Fourco Glass Co. v. Transmirra Products Corp., 353 U.S. 222 (1957), and rejected the argument that amendments to the general venue statute, 28 U.S.C. § 1391, had broadened § 1400(b) by supplying a general definition of residence.
The effect was immediate. A defendant that could previously be sued anywhere it made sales could now be sued only in its state of incorporation or where it had a physical business presence, and the Federal Circuit spent years defining the second half of that test.
The post-2017 venue map
| Issue | Rule | Authority |
|---|---|---|
| Residence of a domestic corporation | State of incorporation only | TC Heartland, 581 U.S. 258 (2017); Fourco Glass, 353 U.S. 222 (1957) |
| Which district within a multi-district state | The single district of the principal place of business, or failing that, of the registered office | In re BigCommerce, Inc., 890 F.3d 978 (Fed. Cir. 2018) |
| Regular and established place of business | A physical place in the district, that is regular and established, and that is the place of the defendant | In re Cray, Inc., 871 F.3d 1355 (Fed. Cir. 2017) |
| Burden of proof on venue | On the plaintiff | In re ZTE (USA) Inc., 890 F.3d 1008 (Fed. Cir. 2018) |
| Waiver of a venue objection | Not waived where the defense was not available before TC Heartland changed the law | In re Micron Technology, Inc., 875 F.3d 1091 (Fed. Cir. 2017) |
| Foreign defendants | § 1400(b) does not displace the rule permitting suit against an alien defendant in any district | In re HTC Corp., 889 F.3d 1349 (Fed. Cir. 2018) |
The second wave and its shape
After filings shifted, a further run of petitions produced grants directing transfer out of the Western District of Texas. In re Apple Inc., 979 F.3d 1332 (Fed. Cir. 2020), In re Samsung Electronics Co., 2 F.4th 1371 (Fed. Cir. 2021), and In re Juniper Networks, Inc., 14 F.4th 1313 (Fed. Cir. 2021), each found the transfer analysis below to have departed from governing law rather than merely to have reached a debatable result.
The recurring criticisms repeat across the orders: treating court congestion as decisive when the comparison rests on speculative trial dates, refusing to credit the location of party witnesses and evidence in the transferee district, and treating general commercial activity as a local interest. A petition that maps onto one of those errors has a defined argument.
The limits that still apply
Volume does not change the standard. Cheney still requires no other adequate means, a clear and indisputable right, and a discretionary judgment that the writ is appropriate, and most petitions are denied.
- Nothing about the merits. A transfer writ says nothing about infringement, validity, or claim construction.
- Reweighing is not review. The question is whether the district court applied the wrong legal framework or reached a patently erroneous result, not whether the appellate court would have balanced the factors differently.
- Denials are usually unexplained. A one-line denial creates no law, which is why the granted orders are cited so heavily.
- No right to a preferred forum. Relief directs the district court to transfer or to reconsider; it does not give a defendant a home-court entitlement.
- Timing. Petitions filed long after the order face an argument that the delay itself defeats the claim of irreparable harm.
The concentration of this practice in a single appellate court is also its main point of criticism. Whether repeated mandamus supervision of one district's transfer rulings is appellate correction or docket management is a question the Supreme Court has not addressed.
Key points
- 28 U.S.C. § 1295(a)(1) routes every patent transfer dispute to one appellate court, which is why mandamus practice under § 1404(a) is denser in the Federal Circuit than anywhere else.
- The Federal Circuit applies regional circuit law to § 1404(a) convenience transfers but its own law to § 1400(b) venue, waiver, and the burden of proof.
- In re TS Tech USA Corp., 551 F.3d 1315 (Fed. Cir. 2008), succeeded by naming four analytical errors, and later petitions are built by matching one of them.
- TC Heartland LLC v. Kraft Foods Group Brands LLC, 581 U.S. 258 (2017), confined patent venue to the state of incorporation or a regular and established place of business, reaffirming Fourco Glass.
- In re Cray supplies the three-part test for a regular and established place of business: a physical place in the district, regular and established, and the place of the defendant.