Nš of Patent
Device
Concession year
8903396

Dimensional control system for long elements by computer vision techniques.

1990
9100912

Pipe for blasting with confined charges

1994
9400354
Intrinsec safety lamp, based in LEDs
1997
9801719

Chamber for measuring cake thickness and filtrate in drilling muds

2001
9801718

Chamber for measuring sand content in drilling muds

2003