Interestingly, it appears that the original author was threatened with patent infringement of US Patent 5,005,210[1]. It seems as though the patent may have expired in 2008[2].
It appears no patent infringement suit was ever brought against the author. The noted rights holder, Motron, apparently doesn't even offer the product that this software was claimed to infringe upon. Here is bit more background on the device that Google served up[3]. Here is Mr. Rager's obituary from 2006[4]. As it stands now, IANAL, the patent should be expired, the noted patent holder does not have a device on the market, the source appears to be intended to be licensed under the GPL v2 or later, though a copyright header is not present in the source files themselves, a file containing the text of the GPL v2 is included as is a file named header.txt that contains the usual text for source files and may have been included as part of the Turbo C project. No traces of a build system are present in the source archive. Just glancing at the source and from the comments of others, there is probably some amount of the source that could be usable. I suspect the UI and the sound interface would need to be written from scratch as they are probably Turbo C and Soundblaster specific, respectively. Still this would be a very useful tool for those interested in radio frequency (RF) work, especially with a laptop or SBC (Raspberry Pi, etc.). - Nate [1] https://www.qsl.net/n9zia/xmit_id/legal.html [2] https://patents.google.com/patent/US5005210A/en [3] https://wiki.w9cr.net/index.php/Transmitter_Fingerprinting [4] https://www.legacy.com/us/obituaries/dispatch/name/richard-rager-obituary?id=28327105 -- "The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true." Web: https://www.n0nb.us Projects: https://github.com/N0NB GPG fingerprint: 82D6 4F6B 0E67 CD41 F689 BBA6 FB2C 5130 D55A 8819
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