JS

Johannes B. J. Schelen

BD B.V. Optische Industrie "De Oude Delft": 2 patents #7 of 31Top 25%
📍 The Hague, NL: #260 of 926 inventorsTop 30%
Overall (All Time): #2,296,499 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5349489 Integrated semiconductor circuit with polarity reversal protection 1994-09-20
5341219 Device and method for controlling the contrast in an image observation system provided with an MCP image intensifier J. van den Berg 1994-08-23