There are many more facts that must be understood before someone could offer a general opinion as to whether you are "part owner" of a business that was purchased by your husband a year before you were married. Ohio no longer recognizes common law marriage, so the fact that you were together for 15 years really does not have much effect on your rights in this matter.
If you and your husband signed a prenuptial agreement, such an agreement would specify whether you have an interest in the bar. There are other factors to consider as well; but they are rather involved and this is not the appropriate forum to address all such factors.
Your best bet is to locate an attorney in your local area. Please consult attorneypages.com to assist you in your search. If you are in the central Ohio area, then you may wish to visit our website at www.jmoserlaw.com . Good Luck.