TELEFUNKEN FERNSEH UND RUNDFUNK GMBH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H03K PULSE TECHNIQUE 1130

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5455533 Transducer circuit with adjustable output impedanceOct 07, 93Oct 03, 95[H03K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4769726 Magnetic tape recorderExpiredDec 02, 85Sep 06, 88[G11B]
4752962 Loudspeaker unit with means for releasably fastening loudspeaker chassis is to its frameExpiredApr 10, 86Jun 21, 88[H04R, H01R]
4636875 Playback device for a digital signal recorded by a plurality of headsExpiredDec 27, 83Jan 13, 87[H04N, G11B]
4595977 Switched mode power supplyExpiredNov 13, 84Jun 17, 86[H02H]
4591733 Circuit arrangement for generating a control voltage which is dependent upon an alternating voltageExpiredJan 14, 83May 27, 86[H03K]
4513253 Electronic amplifier having a transmission factor that is variable by means of a controllable voltage, specifically an expanderExpiredDec 17, 82Apr 23, 85[H03G]
4490687 Electronic amplifierExpiredDec 17, 82Dec 25, 84[H03G]
4490754 Video recorder with reduced audio interferenceExpiredApr 23, 82Dec 25, 84[H04N]
4477840 Video recorderExpiredApr 06, 82Oct 16, 84[H04N]
4473204 Method of mounting a plate on a base and mounting plug thereforExpiredJan 30, 81Sep 25, 84[F16M]
4455580 Video recorderExpiredMar 19, 82Jun 19, 84[H04N, G11B]
4441041 Circuit arrangement for generating a direct control voltage which is dependent on an alternating voltageExpiredJun 17, 82Apr 03, 84[H03G]
4425644 PCM Signal systemExpiredJun 15, 81Jan 10, 84[G06F]
4406978 Horizontal deflection output transformer for a television receiverExpiredJan 21, 81Sep 27, 83[H01J]
4406988 Circuit for processing a digital signalExpiredMar 02, 81Sep 27, 83[H03K]
4388650 Television receiver audio channel operating according to the intercarrier systemExpiredMay 08, 81Jun 14, 83[H04N]
4353035 Circuit for compression or expansion of an electrical signalExpiredMay 12, 80Oct 05, 82[H04B, H03F]
4351047 Centering of a disc-shaped record carrier on a turntableExpiredOct 02, 80Sep 21, 82[G11B, G01B]
4347538 Method and apparatus for the measurement and indication of the position of a coiled material in tape formExpiredAug 06, 79Aug 31, 82[G11B]
4334318 Broadcast receiver tuning circuitExpiredMar 26, 80Jun 08, 82[H04B]

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