Patent Protection Ended
| No. | Patent No. | Title |
| 8501. | PI 91000834 | METHOD OF MANUFACTURING SLIDE FASTENERS |
| 8502. | PI 91000835 | SHOE HEEL SPRING AND STABILIZER |
| 8503. | PI 91000836 | COMPOSITE CLAY MATERIALS FOR REMOVAL OF SOX FROM GAS STREAMS |
| 8504. | PI 91000837 | REWORKABLE ADHESIVE FOR ELECTRONIC APPLICATIONS. |
| 8505. | PI 91000838 | FLOW RATE REGULATING MECHANISM FOR GAS LIGHTERS AND SIMILAR DEVICES AND METHOD OF PRODUCING A MICROCELL POLYMER FILTER FOR USE THEREIN |
| 8506. | PI 91000841 | BENZOPYRAN DERIVATIVES AND HETEROCYCLIC ANALOGS THEREOF AS ANTIISCHEMIC AGENTS. |
| 8507. | PI 91000842 | A LOCK BARREL ASSEMBLY AND KEY THEREFOR. |
| 8508. | PI 91000843 | TASTE-MODIFICATION COMPOSITION AND METHOD FOR STABILIZING TASTE-MODIFIER |
| 8509. | PI 91000844 | BLEACH ACTIVATION. |
| 8510. | PI 91000845 | BLEACH ACTIVATION BY MANGANESE BASED COORDINATION COMPLEXS |
| 8511. | PI 91000847 | PROCESS FOR STOPPING OF A ROTATING RECORD-SHAPED INFORMATION MEDIUM. |
| 8512. | PI 91000848 | HERBICIDAL SOLUTIONS BASED ON N-PHOSPHONOMETHYLGLYCINE. |
| 8513. | PI 91000849 | A METHOD FOR ACQUISITION OF SEISMIC DATA AT SEA. |
| 8514. | PI 91000850 | ROTARY TYPE ELECTRONIC PARTS. |
| 8515. | PI 91000851 | MAGNETIC HEAD CLEANING SYSTEM AND CLEANING UNIT FOR USE THEREIN HAVING A CLEANING MEMBER CAPABLE OF ROTATIVELY SHIFTING. |
| 8516. | PI 91000852 | FALL-ARREST SYSTEMS. |
| 8517. | PI 91000853 | PHOTOGRAPHIC PROCESSING APPARATUS. |
| 8518. | PI 91000855 | LUBRICANTS |
| 8519. | PI 91000857 | FACILITY FOR SCREEN CORRECTION IN A TELEVISION DEVICE. |
| 8520. | PI 91000858 | PROCESS AND DEVICE FOR THE STRIP MOUNTING OF SMT CAPABLE SEMICONDUCTOR CHIPS AND AN SMD BOARD MOUNTED THEREBY. |
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