definiens: means ( a ) unexpired letters patent ( including inv entor ’s certificates ) which have not been held invalid or unenforceable by a court of co mpetent jurisdiction from which no appeal can be ta ken or has been taken within the required time period ( and whi ch have not been admitted to be invalid or unenforc eable through reissue, disclaimer or otherwise, or been a bandoned in accordance with or as permitted by the terms of this Agreement or by mutual written agreement ), inc luding any substitution, extension, registration, c onfirmation, reissue, reexamination, supplementary protection ce rtificates, confirmation patents, patent of additio ns, renewal or any like filing thereof ; ( b ) pending application s for letters patent which have not been canceled, withdrawn from consideration, finally determined to be unallowable by the applicable Governmental Authority or court for whatever reason ( and from which no appeal is or can be taken ), and/or abandoned in accordance with or as permitted by the terms of this Agreement or by mutu al written consent, including any continuation, div ision or continuation - in - part thereof and any provisional ap plications ; and ( c ) any international or regional c ounterparts to ( a ) and ( b ) above