Provide history field for various contact fields
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It would be nice if AppColl could provide a read-only field that was, in effect, a list of previous contacts that had a particular role with respect to a patent application, such as "Attorney" or "Paralegal." Sometimes, it becomes necessary to reassign matters to different individuals, e.g., due to someone leaving the firm or taking an extended leave (e.g., parental leave, sabbatical, etc.).
It would be nice to be able to filter matters based not just on who those matters presently list as attorney, paralegal, etc., but also who they previously listed in such roles. This could help with reversing those assignments at a later date if the previously assigned person returns to work at the firm.
For example, an "AttorneyHistory" field could store all attorneys that have been assigned to a matter, while ParalegalHistory could do the same for all paralegals that have been assigned to the matter. You could have ContributorHistory, PartnerHistory, and ClientContactHistory as well, but those likely aren't quite as immediately useful.
Otherwise, one has to either think ahead and export the previous assignments before updating them (so you can do a bulk reverse update if you want to restore the original assigned practitioner/paralegal) or parse through the Transaction History to identify all cases where the original assigned practitioner/paralegal was changed, and then craft a filter that identifies all of those matters by docket number (which could easily require multiple queries due to the filter string length limitations).
