Should I wait until after my doctoral disputation to apply for a job in the industry?

Applying and interviewing can take months before you are given an offer.

In my case I started applying 9 months before defending my thesis, and had interviews going on for a certain position for months: the first over the phone one was in April and I ended up doing the face to face interview in September, two days after my defense.

Other PhD students of my same year even found a job one year before defending the thesis, and started working while finishing it.

Just make clear what is your expected availability date when you apply.

Yes you should apply, there is no benefit to waiting after just as long as the job search doesn't affect your usual work. Remember that companies hire all year around depending on their need, and if companies want to hire you they'll be fine waiting for four months for you to start, and you'll gain a lot of experience to what the job market is like right now around you. Job searching also takes a long time so the earlier you start the better. Also just to add on if you're worried about completing the degree before applying, I think its the norm for students to look for jobs before completing their degree during their penultimate and final year.

You can start applying for open positions right away, just make sure that you have your CV updated properly at proper time. In other words, one should not need to be looking hard to find whether you are about to obtain the degree or already holding it. Make it clear upfront.

If nothing else, you'll gain experience. All the best.