DH

David Hirst

Overall (All Time): #743,411 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
8396607 Grid responsive control device 2013-03-12
7830037 Grid stabilising system 2010-11-09
7652394 Responsive electricity grid substation 2010-01-26
7387278 Parachute ripcord pins Adrian Jones 2008-06-17
6769650 Parachutes Nigel Stuart Parker 2004-08-03
6276638 Parachutes Nigel Stuart Parker 2001-08-21
6003815 Parachutes Nigel Stuart Parker 1999-12-21