Patent Protection Ended
| No. | Patent No. | Title |
| 21501. | UI 91001829 | HOT AIR DRYERS |
| 21502. | UI 91001830 | IMPROVEMENTS IN GAITERS |
| 21503. | UI 91001851 | STRUCTURE OF SPARK PLUG |
| 21504. | UI 91001952 | A DIRECT TRANSMISSION SYSTEM FOR A BICYCLE |
| 21505. | UI 91001966 | BUILDING BLOCK |
| 21506. | UI 91001991 | IMPROVEMENTS IN OR RELATING TO CLOSURE FOR CONTAINERS |
| 21507. | UI 91002019 | FERROCEMENT FLOATS |
| 21508. | UI 91002034 | RAINGUARD FOR RUBBER BEARING TREE |
| 21509. | UI 91002043 | AN IMPROVED LOCKING DEVICE |
| 21510. | UI 91002112 | IMPROVEMENTS TO BEDDING FURNITURE |
| 21511. | UI 91002150 | "AUTOMATIC CUT-OFF VALVE" |
| 21512. | UI 91002151 | IMPROVEMENTS TO CONFECTIONERY PLATE |
| 21513. | UI 91002204 | A SPRAY TOOL FOR AIDING SPRAY WORK AT ELEVATED POSITIONS |
| 21514. | UI 91002217 | AN APPARATUS TO DISPLAY TWO DIMENSIONAL IMAGES |
| 21515. | UI 91002218 | TAGGED ARTICLES AND METHOD AND APPARATUS FOR THEIR PRODUCTION |
| 21516. | UI 91002224 | A TOWEL ROLLING DEVICE |
| 21517. | UI 91002289 | JOINT MEANS FOR FURNITURE |
| 21518. | UI 91002292 | A PEANUT HARVESTER |
| 21519. | UI 91002328 | PLANAR BOARD DIAPHRAGM FOR ELECTRO-ACOUSTIC TRANDUCERS. |
| 21520. | UI 91002329 | "EXTENSIBLE SPEAKER BOX" |
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