AA freely admits that the person who originally designed the AA
Eagle in the early 1930s based the eagle's design on an ad he saw for Scotland's Glen Eagles Hotel. Glen Eagles still uses a logo of an eagle, with talons extended.
and the Glen Eagles Hotel have been able to share similar logos for nearly 80 years, then presumably AA
, Glen Eagles, and the Crystal Palace Eagles can share similar logos, too.
The only time I recall AA
charging another company with trademark infringement was in the early 1980s, when a new non-scheduled airline in the USA chose the name "American Eagle". American Eagle went bust within a year or two after its establishment, and a year or two later, AA
chose the brand name American Eagle for their then-new commuter airline program, to ensure no non-AA affiliated airline could use the name American Eagle.