In Washington State, concealed carry refers only to firearms. There is still a limit on the length of blade you can have on your person, concealed or otherwise, except for specific instances, like out in the wilderness, or at home, or at work in specific professions.
_________________________
The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)