ZR

Zhang Zheng Ru

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 M L K Drive, CN: #2 of 3 inventorsTop 70%
Overall (All Time): #2,213,097 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6379404 Additive used in the combustible water/hydrocarbon fuel mixture — 2002-04-30
5205664 Lead-auto-sharpened propelling pencil and the making process thereof Fu Yushan 1993-04-27