PG

Pierre Grandfils

CF Charbonnages De France: 5 patents #3 of 57Top 6%
📍 Précy-sur-Oise, FR: #2 of 3 inventorsTop 70%
Overall (All Time): #1,066,777 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
4358224 Continuous sliding support gantry for a large passage Guy Blanpain 1982-11-09
4348138 Sliding supporting gallery Guy Blampain 1982-09-07
4248136 Thrust device using hydraulic jacks Guy Blanpain 1981-02-03
4231672 Heavy duty adjustable prop with a ball-and-socket joint Guy Blanpain 1980-11-04
4212362 Device for causing translation of a tracked machine Guy Blanpain 1980-07-15