My wife and are looking forward to the joy of coming to the United States ... Hiring a car and driving around California, Oregon and Washington for the month of November. I grew up on a farm, have worked fishing boats, police .... And have a 4" folding blade in my pocket at all times. Here in NZ this can be seen as "carrying an offensive weapon ". And charges can be laid. Depends on the officer / situation. they are "offensive weapons" under the Crimes Act and should only be carried with a lawful, proper and sufficient purpose (this does not include "self-defence").* Then the only defense is " reasonable cause". I take my chances. I keep a low profile. She expressed concern. "What if the US Police find that in my pocket?" What be the situation in these states.? Is it illegal to carry a folding pocket blade? Is it common? .