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Patent applications and USPTO patent grants for Chan; Tak Ko.The latest application filed is for "stop announcement system and method therefor".
Patent | Date |
---|---|
Stop announcement system and method therefor Grant 11,364,942 - Chan , et al. June 21, 2 | 2022-06-21 |
Stop Announcement System And Method Therefor App 20200207386 - CHAN; TAK KO ;   et al. | 2020-07-02 |
Method And System For Promotional Offers Exchange App 20160171489 - Chiu; Jason Felix Tsz-Kiu ;   et al. | 2016-06-16 |
Method And System For Implementing Transactions And Promotional Offers App 20150154634 - Chiu; Jason Felix Tsz-Kiu ;   et al. | 2015-06-04 |
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