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"JH" is the trademark for JH Jewelry Company which was in New York. The company started in 1974 and received the trademark in 1990. You can read more about it here:
Sorry, we can only research one company per question. Once this one is accepted and rated (preferably a "5"), you can ask another question about NH.
I am so sorry about that. NH was used a mark used by Nussbaum and Hunold (Walter Hunold) in Rhode Island. The patent dates are from the first two decades of the 1900s. The NH symbol has been discontinued.
Again, please accept my apologies.
You're so very welcome. Please don't forget the rating.
This is the rating I was referring to:
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