Not to worry... I'm sure that the CA legislature will be along shortly, they'll need something else to protect the public from, after they have finished banning all handguns except for possibly break open, single shot .22 rimfires, and limiting our ammo purchases to one 50 rd box every other month, in even numbered years only.
As with gun laws, knife laws vary by state, some have more, some have less.
In 2009 there was an effort at the Federal level by the Office of Customs and Border Patrol (CBP) to alter their interpretation of the definition of switchblade knives in 1958 Switchblade Knife Act, to include spring-assisted or one-handed-opening knives.
That would have led to about 80% of the folding knives on the market becoming illegal.
Fortunately thanks to the efforts of various pro-knife organizations such as kniferights.org (like what the NRA is to firearms), it didn't succeed... The 2010 fiscal year budget bill passed for the Deptment of Homeland Security (which oversees the US Border Patrol) contained an ammendment that clarified that assisted-opening pocketknives are exempt from
current (my emphasis) regulation.
Oh.... and CA hasn't been completely sitting on the sidelines either:
Knife Rights - California Appeals Court Throws Out Misguided Switchblade Ruling