AirTags were leaked via trademark in 2019.[1] Tile has been around since 2012.[2] Someone on HN said something about whistling in the 80s.[3] Who did it first?

[1] https://www.macrumors.com/2019/10/28/airtag-trademark/ [2] https://en.wikipedia.org/wiki/Tile_(company) [3] https://news.ycombinator.com/item?id=27106048