Legal Question in Real Estate Law in California

It's going to depend on the exact terms of your lease and how the items are attached to the building. The general rule is that "improvements" to the building belong to you, and "fixtures" belong to the tenant. However that can be varied by contract, and the distinction between the two can be pretty tricky.

Any specific provisions in the lease would control; look for language relating to "fixtures" or "trade fixtures." If there's nothing that covers the situation, keep in mind that court decisions tend to be rather favorable to a commercial tenant's right to remove trade fixtures. The items you mention were allowed to be removed by the departing tenant in one case I read as a law student. In contrast, in another case the tenant installed a furnace, which became part of the realty at the end of the lease. Note that the tenant is supposed to remove his fixtures before the end of the lease; he'll likely forfeit his right to them if they're left after he turns over the keys or abandons the premises.