The control number serves as internal USPTO department file number and is the only way to access current movement of documents in process. Historical time lines of the past processes provide approximate assessments of future movements. Some interest in the assignor and assignee, if you notice the patents were signed to Swartz and Lincoln. I guess as collateral for TFG (Toxic Funding Group Inc.) The links in the assignee also include recent new properties acquired in acquisitions. Just for reference.