Karl H. Feistel

W& Wandel & Goltermann Gmbh &: 1 patents #6 of 18Top 35%

📍 Westerburg, DE: #38 of 81 inventorsTop 50%

Overall (All Time): #2,342,315 of 4,157,543Top 60%

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Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4659995	Active fourth-degree filter element	—	1987-04-21
4223272	Four-terminal network of adjustable transfer function	—	1980-09-16