Accessibility: Registered Trademark logo in Text Logo custom font face

I have created a custom font face for a client's logo, which is a registered trademark. For SEO reasons, the Logo is in a H1 tag at the top of the page. From an accessibility perspective, would it be acceptable to drop the '®' from the type and put the registered trademark logo in with another glyph? I.e. changing the S glyph to contain the registered trademark logo?