Trademark rights may be strengthened:
by use of bold, capital letters,
by using the mark with distinctive spelling,
by using the mark with a logo or design,
when used consistently, without abbreviation or altering the mark, and
by developing a family of marks (e.g., McDonalds, McMuffin, McGriddle, etc.).
If you have a question about strengthening marks, askme at thedford@askmeip.com.