DG

David Charles Grainger

BC Bce: 2 patents #55 of 182Top 35%
Overall (All Time): #2,075,061 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8488593 Apparatus and system for controlling signal filtering Frank Siu Hong Chan 2013-07-16
8488594 Apparatus and system for bridging communication signals Frank Siu Hong Chan 2013-07-16