NG

Norman G. Gratke

WB W. H. Brady: 2 patents #1 of 8Top 15%
📍 Elm Grove, WI: #1 of 11 inventorsTop 10%
🗺 Wisconsin: #116 of 1,637 inventorsTop 8%
Overall (1989): #19,256 of 140,708Top 15%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4876461 Self-referencing capacitive key cell structure and switchcore matrices formed therefrom — 1989-10-24
4857684 Capacitance membrane switchcore with intertrace capacitive coupling and/or intratrace capacitive coupling — 1989-08-15