DH

David P. Herd

SI Smith International: 4 patents #147 of 708Top 25%
HU Heriot-Watt University: 1 patents #19 of 104Top 20%
ME Mcevoy Oilfield Equipment: 1 patents #2 of 5Top 40%
📍 Auchterarder, TX: #1 of 1 inventorsTop 100%
Overall (All Time): #840,245 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
10024806 Microwave cavity sensor Marc Desmulliez, Sumanth Kumar Pavuluri, David Flynn 2018-07-17
4685655 Pressure-balanced gate for split-gate valve 1987-08-11
4451047 Seal Duane E. Gibson 1984-05-29
4340204 High pressure gate valve with preloaded, stacked, solid lubricated stem seals 1982-07-20
4294284 Fail-safe, non-pressure locking gate valve 1981-10-13
4272055 Single double backseat 1981-06-09