CY

Chengpeng Yu

Overall (2021): #171,242 of 548,734Top 35%
2
Patents 2021

Issued Patents 2021

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
10974540 Retractable pen with a push button 2021-04-13
10960705 Detachable and retractable pen 2021-03-30