On Google books I happened to find the FTC report In the Matter of Certain Portable Electronic Calculators, Investigation No. 337-TA-198, dated July 1985. This report details actions TI brought against importers of calculators based on one of TI's patents. I found it because it has references to the Anita, Friden EC130, HP 9100, and HP-35. I haven't read it all, but the portions I've looked at are interesting.
Google's display of the pages claims that they are copyrighted, but this is incorrect. As a document authored by the United States Government, it is not subject to copyright, and is thus in the public domain.
I may try to obtain a paper copy to scan so I can make a PDF available online.