WiFi is patented
Seemant pointed out an interesting article this morning, where the Australian Commonwealth Scientific and Research Organization (CSIRO) have successfully filed an injunction against Buffalo, a manufacturer of wireless routers, access points, and wireless adapters. Buffalo are no longer able to sell wireless equipment in the US unless it licenses the technology from CSIRO.
Further research shows that CSIRO believe they own the rights to orthogonal frequency division multiplexing, which is the data modulation scheme used in 802.11a, 802.11g and 802.11n (note that 802.11b, the older/slower standard, uses complimentary code keying instead).
If this lawsuit succeeds, it means bad news for all wireless vendors.