Well, a little searching revealed the following: * CA Penal Code §21510 Carrying switchblades > 2 inches illegal * CA Penal Code §171 Knife with locking blade

Well, a little searching revealed the following: * CA Penal Code §21510 Carrying switchblades > 2 inches illegal * CA Penal Code §171 Knife with locking blade > 4 inches illegal in public buildings or meetings * CA Penal Code §626.10 Knife with blade > 2.5 inches or any locking knife illegal in schools also in any Federal facility (e.g., Post Offices): * 18 USC §930 Knife with blade >= 2.5 inches considered "dangerous weapon," possession of which is illegal