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Patent Protection Ended

No. Patent No. Title
8201. PI 91000343 TELEVISION TRANSMISSION SYSTEM
8202. PI 91000344 CONTINUOUS CIPHER SYNCHRONIZATION FOR CELLULAR COMMUNICATION SYSTEM.
8203. PI 91000345 POLYIMIDE COPOLYMERS CONTAINING 4,4''-BIS (P-AMINOPHENOXY) BIPHENYL AND SILOXANE DIAMINE MOIETIES.
8204. PI 91000349 COIN INTERMITTENT ACCEPTING DEVICE OF RESERVATION TYPE COIN ACCEPTOR OR THE LIKE.
8205. PI 91000350 DRIVE SYSTEM ROLLER APPARATUS.
8206. PI 91000351 THE "DURA" FOUNTAIN PEN.
8207. PI 91000353 PROCESS FOR MAKING THICK MULTILAYERS OF POLYIMIDE.
8208. PI 91000354 3-ARYLCARBONYL-1-AMINOALKYL-1H-INDOLE-CONTAINING ANTIGLAUCOMA COMPOSITIONS
8209. PI 91000355 1-<[O-(CYCLOPROPYLCARBONY)PHENYL]>- 3-(4,6-DIMETHOXY-2-PYRIMIDINYL) UREA AND METHOD FOR THE PREPARATION THEREOF.
8210. PI 91000356 A CONTROL APPARATUS FOR HYDRAULIC ELEVATORS.
8211. PI 91000358 HEAT RESISTANT PROPYLENE POLYMER COMPOSITIONS.
8212. PI 91000359 VITREOUS CERAMIC COMPOSITION SUITABLE FOR COATING CERAMIC ARTICLES.
8213. PI 91000360 VITREOUS CERAMIC COMPOSITION WITH HIGH CRYSTALLIZA- TION SPEED FOR GLAZING CERAMIC PIECES AND IN PARTICULAR TILES.
8214. PI 91000361 BENZISOTHIAZOLINONE-1-DIOXIDE DERIVATIVES AS ELASTASE INHIBITORS.
8215. PI 91000363 ACETIC ACID DERIVATIVES.
8216. PI 91000364 A PROCESS FOR PRODUCING A RESIN BONDED MAGNET STRUCTURE.
8217. PI 91000367 HERBICIDAL CARBOXAMIDE DERIVATIVES.
8218. PI 91000368 ISOMERIZATION OF EPOXYALKENES TO 2,5-DIHYDROFURANS AND CATALYST COMPOSITIONS USEFUL THEREFOR
8219. PI 91000369 GRAFT COPOLYMER COMPOSITIONS
8220. PI 91000371 HANDLE FOR ARTICLE CARRIER.