AC

Alec R. Carruthers

AL Alh Systems Limited: 2 patents #2 of 7Top 30%
BP British Gas Plc: 2 patents #32 of 173Top 20%
BP Bg Plc: 1 patents #11 of 60Top 20%
Overall (All Time): #1,043,584 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
6354568 Sliding plate valve — 2002-03-12
5054677 Pipe burster — 1991-10-08
4928866 Pipe burster — 1990-05-29
4705116 Mole with rotary vibrator — 1987-11-10
4627470 Sealing ducts — 1986-12-09