A five-part introduction
https://ipwatchdog.com/2020/10/08/brief-guide-subsequent-patent-applications-united-states-part-foundation/id=125949/
https://ipwatchdog.com/2020/10/23/types-subsequent-patent-applications-united-states-part-ii/id=126624/
https://ipwatchdog.com/2020/11/14/implications-filing-subsequent-patent-applications-united-states-part-iii/id=127312/
https://ipwatchdog.com/2020/12/28/prosecution-litigation-implications-subsequent-patent-applications-part-iv/id=128451/
https://ipwatchdog.com/2021/01/06/eight-steps-success-navigating-subsequent-patent-applications-united-states/id=128745/