Chan is an important cultural icon because he was the first positive portrayal of a Chinaman (why is okay to call a British guy an Englishman or a Scotsman and a French guy, a Frenchman but not okay to call a Chinese guy a Chinaman? How is that any different?), before him Chinese characters were used exclusively as villains or mere servants. Also Chan was not subservient or deferential to whites. The white guys in the movies were often deferential to him actually, and always treated him at least like an equal, racist caricature my ass.
Charlie Chan is owned by the estate of Earl Derr Biggers
I recommend Charlie Chan at the Race Track (1935) starring Warner Oland.