Came across a patent: <https://patents.google.com/patent/US5737592A/> My non-professional analysis says that at one point IBM held a patent on systems which accepted an HTML input form, used the data to consult and/or change a SQL database, and returned results from that operation using HTML. Obviously, a *lot* of systems do this. Fortunately, the patent expired in 2015. But I was doing this without permission in years preceding that. And a lot of other SQLite users were doing likewise. Do my ex-employers owe CISCO money ? Or can one of you dig up a documented case of prior art ? (Prior to June 1995, that is.) Are there other patents which concern common uses of SQLite ? But it's better we don't know, because if you get caught *unknowingly* violating a patent you can just say "Oh sorry." and stop doing it.