* https://mailarchive.ietf.org/arch/msg/cfrg/qLTveWOdTJcLn4HP3...
The linked patent reflects the unpaid upkeep fee and shows a status of expired as a result.
* https://mailarchive.ietf.org/arch/msg/cfrg/qLTveWOdTJcLn4HP3...
The linked patent reflects the unpaid upkeep fee and shows a status of expired as a result.