Yes, Wahl-Eversharp is another one done well I could have had in my short list. They are respectful of the tradition of the name but not pretending to be the original company.
I don't know what Syd and compatriots had to do/pay to own the trademarks, but I can confirm the "Eversharp" part was being used for pen related products and they probably had to pay to get them, and Wahl is of course still going in non-writing instrument products. I purchased some "generic" ballpoint refills using the Eversharp name and logo in a drug store about 10 years ago. I think (but am not sure) they were the same refills as sold under the "Penatia" brand, and I believe under some private label store brands today. They did function well, fwiw.
They don't need to acquire patents; patents don't last that long. Depending on when filed and what type of patent, they are about 14-20 years from original filing in the US, and Esterbrook has been functionally dead for much longer than that.
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