I read about that decision and it is pretty stupid but my understanding of the "holding" (if it stands) is that any folder that is "locked open" and concealed would be consider an illegal concealed "dirk or dagger" in violation of CA law.
This means if you have an folding/sliding box cutter/utility knife "locked" open and concealed in your pocket, you could be changed/convicted of a violation of illegal carrying a concealed "dirk or dagger."
However, as an ex-cop and retired lawyer, I have to note that there is "the law" and then there is "reality."
The reality is that if you have a box cutter/utilty knife "locked" open in your pocket, no one is really going to know that you do. The same thing applies to carrying a fixed blade "dirk or dagger" illegally concealed, which I do all of the time.
Of course, no one will know that I am carrying an illegal concealed weapon (whether it's a knife or gun) unless I reveal it and who is stupid enough to reveal that they are carrying a weapon illegally, except the few people (usually repeat offenders) who are caught doing so.
So, FWIW, I wouldn't worry much about this decision because it really changes nothing BUT, if you are the type of person who gets stopped and frisked by LEO's from time-to-time, you should make sure than any box cutters/utility blades that you are carrying in your pocket are CLOSED.
While I agree with much of this (and most likely, your general sentiment on the matter), in the case in question, the box cutters were in the closed position. The court states:
"Defendant was searched and a box cutter was found in the right pocket of his pants. It was a folding box cutter that locked into place when opened. When in the locked open position, the exposed portion of the blade was about an inch in length and very sharp. A second box cutter was found in the side pocket of defendant's backpack. It also locked when in the open position, exposing a sharp, one-inch blade. No visible blood was on either box cutter, nor were there visible blood drops or smears on defendant."
By discussing the opening and locking mechanism, it suggests the box cutters were closed.
More explicitly:
"Defendant next contends that a closed box cutter without an exposed blade is not, as a matter of law, a dirk or dagger ... He says
both box cutters were closed and the blades were not exposed and therefore there is no evidence supporting his conviction ...
Deputy Gamboa testified the box cutter found in defendant's pants pocket was a “folding box cutter” with a button on the handle. When the button was depressed, the blade slid open and locked into a fixed position. The button had to be depressed again to retract the blade into the handle. The box cutter found in the side pocket of defendant's backpack was a “non-folding box cutter” that had a button to slide the blade open and which locked the blade into place. The button had to be pushed again to retract the blade.
Neither box cutter was a nonlocking folding knife. Defendant concedes that both box cutters locked into a fixed position when open and therefore do not qualify as nonlocking knives. The box cutters obviously were not pocketknives, and defendant does not contend they were.
D
efendant maintains however that because the blades on both box cutters either folded into the handle (the one found in his pocket) or retracted with a push of a button (the one found in his backpack), they qualify as non-switchblade folding knives and the statutory exemption therefore applies.
We are not persuaded." (Emphasis added.)
The court is saying it doesn't matter whether open or closed in this instance. The case is problematic for many reasons, but in this instance, the court expressly ruled that it made no difference whether the box cutters were open or closed.