What does 登録商標マーク look like on HTC?

On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.

When did HTC add 登録商標マーク?

HTC first drew 登録商標マーク in Sense 7, released 2015年3月30日.

HTC Corporation has shipped 2 versions of 登録商標マーク. Each is dated, so you can see when the design changed.

HTC

HTC Corporation has drawn 登録商標マーク 2 times. Every revision HTC has shipped is below, newest first.

What does 登録商標マーク look like on HTC?: On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.
When did HTC add 登録商標マーク?: HTC first drew 登録商標マーク in Sense 7, released 2015年3月30日.
How many times has HTC redrawn 登録商標マーク?: HTC Corporation has shipped 2 versions of 登録商標マーク. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.