C3 Patent and Intellectual Property Law

Oct032009 | Steve O'Donnell

Hey dude, don't fear TI. Take a calculator and make it better

For the geeks that came before me, it was the slide rule; for those that came after me it's probably a Linux tablet; but for those around my age, it was the graphing calculator (specifically the TI-81). It was something you could carry like a badge of your geekiness, warning others that they'd probably work for you at some point. Now, Texas Instruments is threatening the programmable calculator geek elite in what appears to be a rather poorly thought out legal and business strategy.

What does a true fan of, well, anything, do with the subject of their fandom? They deconstruct and reconstruct it. Think of it, if you really love music, you make your own, if you really love a show you might write fan fiction or analyze the canon to death. If you really love technology, you tweak it and make it better. So it's no surprise that a group of programmable calculator enthusiasts have taken it on themselves to modify their calculators.

Of course, nothing worth doing is easy, and installing a homebrew OS on a calculator is worth doing, so of course, there have to be hoops. The main hoop is that the Texas Instruments calculators check the signature of software before allowing it to load on the hardware. In order to find the private keys that could be used to unlock the hardware, the public keys were analyzed via distributed computing. Once the key was discovered, the hardware could be unlocked and calculator owners would install their own operating systems.

One might think this would make TI happy. After all, between notebooks, netbooks, tablets and iPhones, I'd think that the market for programmable calculators was not as big as it once was. Of course no one asked my opinion.

TI has instead decided to fire off cease and desist letters under the theory that the anti-circumvention provisions of the Digital Millennium Copyright Act give TI the power to force the suppression of the keys. I think TI, or more appropriately, TI's attorneys are reading even more into the DMCA than there already is and there are some problems that TI would encounter if they tried to assert their claims in court.

First, the DMCA, among other things, prohibits circumvention of technological measures put in place to prevent copying files as well as the distribution of circumvention tools. But, the operating system and boot code on the calculators is not encrypted, so no circumvention is needed to get to it. Second, the DMCA explicitly allows people to reverse engineer code in order to achieve interoperability with other software, such as a homebrew OS. Lastly, there needs to be some nexus between the actions and copyright infringement in order for the DMCA to attach. In this instance, the calculator homebrewers weren't distributing TI's copyrighted code, but were installing their own operating system on their own calculators, so there is no copyright infringement.

Why is TI challenging these homebrewers? I can't say. I don't understand it. I would think that the possibility of selling some more calculators would be more attractive than threatening their remaining customers. Now, I must admit, even though I don't think TI would have much chance in court, that doesn't make it so; the courts have not (yet) ceded ultimate authority to me. But even if TI does have the legal ability to shut down homebrewers I fail to see how they can benefit from threatening their customers.

Photo licensed under the Creative Commons Attribution ShareAlike 3.0 License.

Sorry about the post title.