does not the employer have a problem here, perhaps more so then yours. After all without clearance their IP is tainted from a purchasers POV. And you did decl

does not the employer have a problem here, perhaps more so then yours. After all without clearance their IP is tainted from a purchasers POV. And you did declare it before you were hired. That they did not do the due diligence BEFORE an offer is made, and accepted, could really cause problems for them. You should really talk to a employment Lawyer, your position may be much better then you think it is. good luck