WiFi Was Invented in Australia and Then Australia Sued Everyone Over It

Somewhere in your house right now, a little box is quietly doing the work of a failed astrophysics experiment. Every time your laptop finds the home network, every time a smart speaker argues with itself over a song request, you're leaning on maths that was originally built to hunt for evaporating black holes — and that never actually found one. Instead it found your router. Oh, and it also triggered one of the most quietly savage patent wars in tech history, with an Australian government science agency on the winning side of a fight against basically every electronics brand you've ever owned.

This is the real story of how CSIRO, Australia's national science agency, ended up owning a piece of the wireless internet — and how that piece turned out to be worth hundreds of millions of dollars.

CSIRO's Parkes radio telescope — ground zero for the signal-processing ideas that ended up in your WiFi router. Image: Wikimedia Commons (public domain).

How Hunting Exploding Black Holes Gave Us Home WiFi

Back in the late 1970s and into the 1980s, a CSIRO radio astronomer named Dr John O'Sullivan was working on one of those gloriously ambitious physics longshots: trying to detect the radio "chirp" theoretically given off by tiny primordial black holes as they evaporate into nothing via Hawking radiation. It's the kind of project that sounds made up, except it isn't — O'Sullivan had cut his teeth at the Netherlands Foundation for Radio Astronomy before joining CSIRO's Radiophysics division, and this black-hole hunt was a genuine, funded piece of research, built around a toolkit of fast Fourier transforms and clever signal-processing tricks for pulling faint, smeared-out signals out of noisy data.

The black holes, perhaps unsurprisingly, did not show up. Nobody has ever confirmed detecting one. But the mathematics O'Sullivan and his CSIRO colleagues — Terry Percival, Diethelm Ostry, Graham Daniels and John Deane — had been refining didn't go to waste. In the early 1990s the team turned the same toolkit loose on a much more earthbound problem: making wireless computer networks actually work indoors.

The issue was something engineers call multipath. Send a radio signal across a room and it doesn't travel in one neat line — it bounces off walls, ceilings, filing cabinets and whatever's in the kitchen, arriving at the receiver as a jumble of slightly-delayed echoes of itself. At the speeds needed for useful data transfer, those echoes overlap and mash into gibberish. You could slow everything down and wait between transmissions to let the echoes settle, but that makes for painfully slow networking. CSIRO's team, borrowing directly from their astronomy toolkit, found a way to spread the data across many narrow frequency channels at once, so each individual channel was barely bothered by multipath while the combined signal still moved fast. It's the same basic trick that lets 802.11 WiFi punch well above its weight indoors, surrounded by walls and microwave ovens and your neighbour's router.

From a CSIRO Lab Bench to Every Router on Earth

CSIRO filed the core patent in 1992, and the US version — number 5,487,069, drily titled "Wireless LAN" — was granted on 23 January 1996. For a few years it just sat there, a neat bit of Australian government IP with no obvious path to market, until 1997, when two engineers, David Skellern and Neil Weste, spun up a company called Radiata to build chips using it. By 1999 Cisco and Broadcom were each stumping up $4 million for an 11% stake, and by November 2000 Cisco simply bought the whole thing outright for a reported A$567 million — a wild return for a technology that started life trying to catch a black hole burping.

From there CSIRO's approach got folded into the IEEE's 802.11a, 802.11g and 802.11n standards — in other words, the actual WiFi running in most routers made since the early 2000s. By the time the patent neared its expiry, CSIRO estimated its fingerprints were on more than three billion devices worldwide, a number industry analysts expected to keep climbing well past five billion. Somewhere in there is almost certainly a device you're holding right now.

Then CSIRO Quietly Sued Almost the Entire Tech Industry

Here's the part that turns this from a nice science story into an absolute legend: once the world's wireless gear was running on CSIRO's patent, CSIRO noticed that almost nobody was paying for the privilege. Licensing talks stalled through the early 2000s, so in 2005 the agency filed suit against networking company Buffalo Technology in a Texas federal court. Intel, Dell, HP, Microsoft and Netgear piled in as co-defendants or countersuits, and by 2006–07 CSIRO had widened the net to roughly eight more companies, including Toshiba, Nintendo, D-Link and Belkin, while Marvell tried the opposite tack and sued to have the patent thrown out entirely.

It got messy — CSIRO won an injunction against Buffalo in 2007, had it stayed on appeal, and had part of the original ruling knocked back on a technicality — but the agency kept its nerve. In 2009, with roughly fourteen companies staring down a jury trial, HP blinked first and settled, with the rest following for a reported total around $205 million. CSIRO then turned its attention to Sony, Lenovo and Acer, and in 2010 went after the telecom carriers themselves — AT&T, Verizon and T-Mobile — for selling WiFi-enabled devices. That case rolled on until March 2012, when the remaining defendants settled for a further roughly $220 million, pushing CSIRO's total haul from a single 1992 patent past $430 million. Not bad for an invention that started out as a failed attempt to eavesdrop on dying black holes.

The recognition followed soon after. In 2012 the European Patent Office handed O'Sullivan and the CSIRO WLAN team a European Inventor Award — the first time an Australian team had won since the prize began — and O'Sullivan went on to collect Australia's Prime Minister's Prize for Science, an IEEE award shared with David Skellern, and a stack of fellowships for a career that technically never found the thing it was originally looking for.

So next time your WiFi drops out mid-video-call, spare a thought for the chain of events behind it: a telescope in the New South Wales outback, a search for an astrophysical phenomenon nobody has ever actually seen, and a decade of very expensive lawyering that ended with half of Silicon Valley writing cheques to Canberra. Science doesn't always find what it's looking for — sometimes it finds something a lot more profitable instead.

Need some wonderful and wacky gifting of your own? Swing by quirksy.com.au for more quirky Australian finds — no patent lawyers required.