Chang; Siao C. L.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Chang; Siao C. L..The latest application filed is for "self-service crossing aid for pedestrians".
- Chang; Siao C. L. - Singapore SG
| Patent | Date |
|---|---|
| Self-service crossing aid for pedestrians Grant 9,852,621 - Chang December 26, 2 | 2017-12-26 |
| Self-service crossing aid for pedestrians Grant 9,659,490 - Chang May 23, 2 | 2017-05-23 |
| Self-service Crossing Aid For Pedestrians App 20170018176 - Chang; Siao C.L. | 2017-01-19 |
| Self-service crossing aid for pedestrians Grant 9,524,639 - Chang December 20, 2 | 2016-12-20 |
| Self-service Crossing Aid For Pedestrians App 20160180703 - Chang; Siao C.L. | 2016-06-23 |
| Self-service Crossing Aid For Pedestrians App 20160180704 - Chang; Siao C.L. | 2016-06-23 |
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