trademark symbol in text

[Deirdre Reagan]

Hi Framers!

This is technically not an FM question, but perhaps you all can help?

What's the standard practice for using the trademark symbol in the
text?  Don't use it?  Use it just for the first instance of the
trademark name?  Use it ever time the trademark name is mentioned?

And is there a style guide ruling on this?  I usually use APA and / or
GPO Style Guide, but I haven't been able to find any ruling.

Thanks so much!

Happy New Year!

Deirdre Reagan