definiens: means ( a ) unexpired letters patent ( including inven tor ’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, re - examination, supplementary protection c ertificates, confirmation patents, patent of additi ons, renewal or any like filing thereof ; ( b ) pending application s for letters patent which have not been canceled, withdrawn from consideration, finally determined to be unallowable by the applicable governmental authority or court for whatever reason ( and from which no appeal is or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 permit ted by the terms of this Agreement or by mutual written consen t, including any continuation, division or continua tion - in - part thereof and any provisional applications ; and ( c ) a ny international or regional counterparts to ( a ) an d ( b ) above