How to superscript within a date environment

[Daniel]

On 2021-07-25 07:09, Steve Litt wrote:
> Hi all,
> 
> On my book, I used the date environment to write "A
> Troubleshooters.Com(R) book, except I used \textregistered. I wanted
> the (R) superscripted, and couldn't find ways that didn't involve math.
> So I finally put the following in ERT (TeX)
> 
> $^{\footnotesize\textregistered}$

This gave me a "Missing glyphs!" error.

Without using math, couldn't you insert a superscript (Insert > 
Formatting > Superscript) and then \textregistered in ERT (Insert > TeX 
Code)?

Daniel