3Dfx does, and NVidia bought them out just recently, so actually yes they do, as much as any company can own an open standard. They do own the liscensing rights, and the rights to incorporate changes into it. The API itself, like most, is open to whoever wants to use it without cost.
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August 19, 1942
[This message has been edited by Mosquito (edited February 14, 2002).]