Chen; Xueyin
Patent Applications and Registrations
Patent applications and USPTO patent grants for Chen; Xueyin.The latest application filed is for "visitation tracking system".
- Chen; Xueyin - Los Angeles CA
| Patent | Date |
|---|---|
| Visitation Tracking System App 20220191643 - Chen; Xueyin ; et al. | 2022-06-16 |
| Visitation tracking system Grant 11,297,463 - Chen , et al. April 5, 2 | 2022-04-05 |
| Visitation Tracking System App 20210092553 - Chen; Xueyin ; et al. | 2021-03-25 |
| Visitation tracking system Grant 10,924,886 - Chen , et al. February 16, 2 | 2021-02-16 |
| Visitation Tracking System App 20200329337 - Chen; Xueyin ; et al. | 2020-10-15 |
| Visitation tracking system Grant 10,779,114 - Chen , et al. Sept | 2020-09-15 |
| Visitation Tracking System App 20200213806 - Chen; Xueyin ; et al. | 2020-07-02 |
| Visitation tracking system Grant 10,681,491 - Chen , et al. | 2020-06-09 |
| Visitation tracking system Grant 10,448,199 - Chen , et al. Oc | 2019-10-15 |
| Visitation tracking system Grant 10,219,111 - Chen , et al. Feb | 2019-02-26 |
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