Doduco KG

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4890035 Discharge electrode with microstructure surfaceExpiredApr 04, 89Dec 26, 89[H01J]
4862303 Magnetic instrument for reading telegraphic signalsExpiredNov 03, 87Aug 29, 89[H02M, G11B]
4639670 Magnetic field sensor comprising Wiegand wires or similar bistable magnetic elementsExpiredFeb 21, 85Jan 27, 87[G01R]
4635227 Reading head for the magnetic scanning of elongate bistable magnetic elementsExpiredNov 02, 84Jan 06, 87[G11B, G11C]
4594489 Electrical switching elementExpiredJan 22, 85Jun 10, 86[H01H]

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