Apple Hid the ‘IPHONE DUO’ Trademark for Nearly Six Months. Here’s How.
Apple unveiled the iPhone Duo this week.
The same day, the company filed a trademark application for the name with the USPTO.
That timing might make it appear as though Apple waited until launch day to protect the name.
It didn’t.
Apple had already filed an application for the ‘IPHONE DUO’ trademark in Liechtenstein on March 12, 2026.
And there was a very good reason for doing so.
Why Apple filed the ‘IPHONE DUO’ trademark in Liechtenstein
Under an international treaty known as the Paris Convention, a company that files a trademark application in one member country has six months to file for the same trademark in other member countries and claim the earlier filing date as its priority date.
That means Apple’s trademark application filed in the United States on September 9th can claim priority back to its March 12th filing in Liechtenstein.
The strategy gives Apple the best of both worlds.
It can establish a priority date in the United States while effectively hiding the name from public view.
In this case, if any other company filed a ‘DUO’ trademark for phones (or related goods) in the United States since March 12th (the date of the Liechtenstein filing), Apple can jump in front of them in line.
Moreover, unlike the United States, where trademark applications are easily searchable online, Liechtenstein is a much more difficult jurisdiction for reporters and trademark watchers to monitor. In fact, no one found the application, and the name remained a complete secret while being legally protected.
Apple executed a textbook-perfect trademark strategy
From my perspective as a trademark attorney, this is a fascinating example of how sophisticated companies use international trademark law not just to protect brands, but to protect product announcements.
If Apple had filed ‘IPHONE DUO’ in the United States back in March, the application would have been public and easily searchable.
Someone would have certainly found it.
The filing would have generated headlines about an “iPhone Duo” months before Apple was ready to announce the device, potentially spoiling one of the biggest reveals of its September event.
Instead, Apple filed in Liechtenstein, waited nearly the full six-month priority window, and then filed in the United States on the same day it announced the iPhone Duo.
Apple didn’t just protect the ‘IPHONE DUO’ trademark.
It used trademark law to help protect the surprise.
Josh Gerben, Esq.
Josh Gerben, Esq. is a nationally recognized trademark attorney and the founder of Gerben IP. Since launching the firm in 2008, he has overseen the registration of over 10,000 trademarks and handled over 1,500 trademark disputes. Josh's practice focuses on building and defending global trademark portfolios for clients. These clients include entrepreneurs, private equity-backed businesses, athletes, celebrities, and public companies. Frequently quoted by major media outlets like CNBC, CNN, The New York Times, and The Wall Street Journal, Josh is widely regarded as a leading authority in trademark law.
Do you need assistance with a trademark matter?
Contact an Attorney Today