I'm still a bit confused. Is the partnership still in place or not? If it got closed off, then surely you would have reached some agreement about disposal of assets of the partnership.
Unless there was some agreement like this, then the equipment is still owned by the business. If you want the equipment, you should be making an offer to buy it from the business. Maybe as a practical suggestion, you could negotiate a price with him to wrap up this issue. You should also make sure the business is formally closed down, so there can be no further issues about assets or liabilities.