Chris and Megan review one of the longest prosecution histories recorded in public PAIR, for application number 05/849,812. Prosecution for application number 05/849,812 has spanned over 40 years, 19 Office Actions, and 7 appeals. For at least the past 20 years, the battle has involved the same examiner and the same pro se inventor. While one can only guess what they are actually fighting about—unless they have the time to read the 632-page appeal brief that was just filed—there is no doubt that this application is worth watching.