Assertion:
More browsers historically support the SUP element than support
the named character entity ™ (trademark symbol.) For widest readability
an alternative method of specifiying this symbol can be to use <sup>TM</sup>
or some variation.
Using ™ Trademark character entity:
filler text ™ filler text
Using <sup>TM</sup> :
filler text TM filler text
Using <small><sup>TM</sup></small> :
filler text TM filler text
Using <small><sup><b>TM</b></sup></small> :
filler text TM filler text