DL

David F. Laurence

PE Petrolite: 1 patents #81 of 143Top 60%
📍 Creve Coeur, MO: #157 of 236 inventorsTop 70%
🗺 Missouri: #13,067 of 23,789 inventorsTop 55%
Overall (All Time): #4,109,223 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4196057 Cold end corrosion rate probe Walter May, Michael J. Zetlmeisl 1980-04-01